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Finding the Fourth Proportional to 485,432.87, 728,148.65 and 130,446.90

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Solution

The fourth proportional to 485,432.87, 728,148.65 and 130,446.90 is: 195,670.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,432.87 : 728,148.65 = 130,446.90 : x
  2. Step 2: Convert to fraction form
    485,432.87/728,148.65 = 130,446.90/x
  3. Step 3: Cross multiply
    485,432.87x = 728,148.65 × 130,446.90
  4. Step 4: Simplify right side
    485,432.87x = 94,984,733,479.45
  5. Step 5: Solve for x
    x = 94,984,733,479.45/485,432.87
  6. Step 6: Final answer
    x = 195,670.17

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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.