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Finding the Fourth Proportional to 372,689.84, 558,329.46 and 220,430.90

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Solution

The fourth proportional to 372,689.84, 558,329.46 and 220,430.90 is: 330,229.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,689.84 : 558,329.46 = 220,430.90 : x
  2. Step 2: Convert to fraction form
    372,689.84/558,329.46 = 220,430.90/x
  3. Step 3: Cross multiply
    372,689.84x = 558,329.46 × 220,430.90
  4. Step 4: Simplify right side
    372,689.84x = 123,073,065,933.52
  5. Step 5: Solve for x
    x = 123,073,065,933.52/372,689.84
  6. Step 6: Final answer
    x = 330,229.19

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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.