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Finding the Fourth Proportional to 648,007.70, 972,011.55 and 447,905.30

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Solution

The fourth proportional to 648,007.70, 972,011.55 and 447,905.30 is: 671,857.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,007.70 : 972,011.55 = 447,905.30 : x
  2. Step 2: Convert to fraction form
    648,007.70/972,011.55 = 447,905.30/x
  3. Step 3: Cross multiply
    648,007.70x = 972,011.55 × 447,905.30
  4. Step 4: Simplify right side
    648,007.70x = 435,369,124,906.22
  5. Step 5: Solve for x
    x = 435,369,124,906.22/648,007.70
  6. Step 6: Final answer
    x = 671,857.95

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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.