Home / 287,948.15-431,586-216,641.78

Finding the Fourth Proportional to 287,948.15, 431,586 and 216,641.78

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Solution

The fourth proportional to 287,948.15, 431,586 and 216,641.78 is: 324,709.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,948.15 : 431,586 = 216,641.78 : x
  2. Step 2: Convert to fraction form
    287,948.15/431,586 = 216,641.78/x
  3. Step 3: Cross multiply
    287,948.15x = 431,586 × 216,641.78
  4. Step 4: Simplify right side
    287,948.15x = 93,499,557,105.15
  5. Step 5: Solve for x
    x = 93,499,557,105.15/287,948.15
  6. Step 6: Final answer
    x = 324,709.70

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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.