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Finding the Fourth Proportional to 648,681.60, 970,689.60 and 438,729.60

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Solution

The fourth proportional to 648,681.60, 970,689.60 and 438,729.60 is: 656,516.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,681.60 : 970,689.60 = 438,729.60 : x
  2. Step 2: Convert to fraction form
    648,681.60/970,689.60 = 438,729.60/x
  3. Step 3: Cross multiply
    648,681.60x = 970,689.60 × 438,729.60
  4. Step 4: Simplify right side
    648,681.60x = 425,870,259,932.16
  5. Step 5: Solve for x
    x = 425,870,259,932.16/648,681.60
  6. Step 6: Final answer
    x = 656,516.63

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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.