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Finding the Fourth Proportional to 291,805.80, 437,708.70 and 287,869.20

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Solution

The fourth proportional to 291,805.80, 437,708.70 and 287,869.20 is: 431,803.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,805.80 : 437,708.70 = 287,869.20 : x
  2. Step 2: Convert to fraction form
    291,805.80/437,708.70 = 287,869.20/x
  3. Step 3: Cross multiply
    291,805.80x = 437,708.70 × 287,869.20
  4. Step 4: Simplify right side
    291,805.80x = 126,002,853,302.04
  5. Step 5: Solve for x
    x = 126,002,853,302.04/291,805.80
  6. Step 6: Final answer
    x = 431,803.80

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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.