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Finding the Fourth Proportional to 285,551.98, 428,328.96 and 72,319.84

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Solution

The fourth proportional to 285,551.98, 428,328.96 and 72,319.84 is: 108,480.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,551.98 : 428,328.96 = 72,319.84 : x
  2. Step 2: Convert to fraction form
    285,551.98/428,328.96 = 72,319.84/x
  3. Step 3: Cross multiply
    285,551.98x = 428,328.96 × 72,319.84
  4. Step 4: Simplify right side
    285,551.98x = 30,976,681,854.57
  5. Step 5: Solve for x
    x = 30,976,681,854.57/285,551.98
  6. Step 6: Final answer
    x = 108,480.01

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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.