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Finding the Fourth Proportional to 656,722.56, 985,139.68 and 207,323.20

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Solution

The fourth proportional to 656,722.56, 985,139.68 and 207,323.20 is: 311,002.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,722.56 : 985,139.68 = 207,323.20 : x
  2. Step 2: Convert to fraction form
    656,722.56/985,139.68 = 207,323.20/x
  3. Step 3: Cross multiply
    656,722.56x = 985,139.68 × 207,323.20
  4. Step 4: Simplify right side
    656,722.56x = 204,242,310,904.58
  5. Step 5: Solve for x
    x = 204,242,310,904.58/656,722.56
  6. Step 6: Final answer
    x = 311,002.43

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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.