Home / 287,949.15-431,587.50-216,642.78

Finding the Fourth Proportional to 287,949.15, 431,587.50 and 216,642.78

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Solution

The fourth proportional to 287,949.15, 431,587.50 and 216,642.78 is: 324,711.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,949.15 : 431,587.50 = 216,642.78 : x
  2. Step 2: Convert to fraction form
    287,949.15/431,587.50 = 216,642.78/x
  3. Step 3: Cross multiply
    287,949.15x = 431,587.50 × 216,642.78
  4. Step 4: Simplify right side
    287,949.15x = 93,500,315,813.25
  5. Step 5: Solve for x
    x = 93,500,315,813.25/287,949.15
  6. Step 6: Final answer
    x = 324,711.21

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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.