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Finding the Fourth Proportional to 6,644,906.40, 9,967,359.60 and 6,581,920.80

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Solution

The fourth proportional to 6,644,906.40, 9,967,359.60 and 6,581,920.80 is: 9,872,881.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,644,906.40 : 9,967,359.60 = 6,581,920.80 : x
  2. Step 2: Convert to fraction form
    6,644,906.40/9,967,359.60 = 6,581,920.80/x
  3. Step 3: Cross multiply
    6,644,906.40x = 9,967,359.60 × 6,581,920.80
  4. Step 4: Simplify right side
    6,644,906.40x = 65,604,371,472,319.67
  5. Step 5: Solve for x
    x = 65,604,371,472,319.67/6,644,906.40
  6. Step 6: Final answer
    x = 9,872,881.20

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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.