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Finding the Fourth Proportional to 656,866.70, 985,688.85 and 432,874.70

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Solution

The fourth proportional to 656,866.70, 985,688.85 and 432,874.70 is: 649,568.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,866.70 : 985,688.85 = 432,874.70 : x
  2. Step 2: Convert to fraction form
    656,866.70/985,688.85 = 432,874.70/x
  3. Step 3: Cross multiply
    656,866.70x = 985,688.85 × 432,874.70
  4. Step 4: Simplify right side
    656,866.70x = 426,679,765,237.10
  5. Step 5: Solve for x
    x = 426,679,765,237.10/656,866.70
  6. Step 6: Final answer
    x = 649,568.27

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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.