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Finding the Fourth Proportional to 493,116.80, 739,675.20 and 280,540.40

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Solution

The fourth proportional to 493,116.80, 739,675.20 and 280,540.40 is: 420,810.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,116.80 : 739,675.20 = 280,540.40 : x
  2. Step 2: Convert to fraction form
    493,116.80/739,675.20 = 280,540.40/x
  3. Step 3: Cross multiply
    493,116.80x = 739,675.20 × 280,540.40
  4. Step 4: Simplify right side
    493,116.80x = 207,508,776,478.08
  5. Step 5: Solve for x
    x = 207,508,776,478.08/493,116.80
  6. Step 6: Final answer
    x = 420,810.60

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Similar ratio
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1.5x scale

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.