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Finding the Fourth Proportional to 287,550.70, 431,326.05 and 203,569.90

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Solution

The fourth proportional to 287,550.70, 431,326.05 and 203,569.90 is: 305,354.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,550.70 : 431,326.05 = 203,569.90 : x
  2. Step 2: Convert to fraction form
    287,550.70/431,326.05 = 203,569.90/x
  3. Step 3: Cross multiply
    287,550.70x = 431,326.05 × 203,569.90
  4. Step 4: Simplify right side
    287,550.70x = 87,805,000,865.90
  5. Step 5: Solve for x
    x = 87,805,000,865.90/287,550.70
  6. Step 6: Final answer
    x = 305,354.85

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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.