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Finding the Fourth Proportional to 509,305,931.70, 763,958,897.55 and 509,305,931.70

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Solution

The fourth proportional to 509,305,931.70, 763,958,897.55 and 509,305,931.70 is: 763,958,897.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,305,931.70 : 763,958,897.55 = 509,305,931.70 : x
  2. Step 2: Convert to fraction form
    509,305,931.70/763,958,897.55 = 509,305,931.70/x
  3. Step 3: Cross multiply
    509,305,931.70x = 763,958,897.55 × 509,305,931.70
  4. Step 4: Simplify right side
    509,305,931.70x = 389,088,798,097,207,552
  5. Step 5: Solve for x
    x = 389,088,798,097,207,552/509,305,931.70
  6. Step 6: Final answer
    x = 763,958,897.55

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.