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Finding the Fourth Proportional to 804,671.70, 1,207,007.55 and 431,423.70

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Solution

The fourth proportional to 804,671.70, 1,207,007.55 and 431,423.70 is: 647,135.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    804,671.70 : 1,207,007.55 = 431,423.70 : x
  2. Step 2: Convert to fraction form
    804,671.70/1,207,007.55 = 431,423.70/x
  3. Step 3: Cross multiply
    804,671.70x = 1,207,007.55 × 431,423.70
  4. Step 4: Simplify right side
    804,671.70x = 520,731,663,148.94
  5. Step 5: Solve for x
    x = 520,731,663,148.94/804,671.70
  6. Step 6: Final answer
    x = 647,135.55

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Half scale
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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.