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Finding the Fourth Proportional to 6,644,258.40, 9,966,387.60 and 6,518,287.20

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Solution

The fourth proportional to 6,644,258.40, 9,966,387.60 and 6,518,287.20 is: 9,777,430.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,644,258.40 : 9,966,387.60 = 6,518,287.20 : x
  2. Step 2: Convert to fraction form
    6,644,258.40/9,966,387.60 = 6,518,287.20/x
  3. Step 3: Cross multiply
    6,644,258.40x = 9,966,387.60 × 6,518,287.20
  4. Step 4: Simplify right side
    6,644,258.40x = 64,963,776,723,318.72
  5. Step 5: Solve for x
    x = 64,963,776,723,318.72/6,644,258.40
  6. Step 6: Final answer
    x = 9,777,430.80

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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.