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Finding the Fourth Proportional to 644,149.20, 966,223.80 and 404,648.40

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Solution

The fourth proportional to 644,149.20, 966,223.80 and 404,648.40 is: 606,972.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,149.20 : 966,223.80 = 404,648.40 : x
  2. Step 2: Convert to fraction form
    644,149.20/966,223.80 = 404,648.40/x
  3. Step 3: Cross multiply
    644,149.20x = 966,223.80 × 404,648.40
  4. Step 4: Simplify right side
    644,149.20x = 390,980,914,711.92
  5. Step 5: Solve for x
    x = 390,980,914,711.92/644,149.20
  6. Step 6: Final answer
    x = 606,972.60

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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.