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Finding the Fourth Proportional to 485,540.76, 724,715.79 and 455,622.60

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Solution

The fourth proportional to 485,540.76, 724,715.79 and 455,622.60 is: 680,060.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,540.76 : 724,715.79 = 455,622.60 : x
  2. Step 2: Convert to fraction form
    485,540.76/724,715.79 = 455,622.60/x
  3. Step 3: Cross multiply
    485,540.76x = 724,715.79 × 455,622.60
  4. Step 4: Simplify right side
    485,540.76x = 330,196,892,500.85
  5. Step 5: Solve for x
    x = 330,196,892,500.85/485,540.76
  6. Step 6: Final answer
    x = 680,060.09

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.