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Finding the Fourth Proportional to 493,280.20, 739,920.30 and 392,896.90

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Solution

The fourth proportional to 493,280.20, 739,920.30 and 392,896.90 is: 589,345.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,280.20 : 739,920.30 = 392,896.90 : x
  2. Step 2: Convert to fraction form
    493,280.20/739,920.30 = 392,896.90/x
  3. Step 3: Cross multiply
    493,280.20x = 739,920.30 × 392,896.90
  4. Step 4: Simplify right side
    493,280.20x = 290,712,392,117.07
  5. Step 5: Solve for x
    x = 290,712,392,117.07/493,280.20
  6. Step 6: Final answer
    x = 589,345.35

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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.