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Finding the Fourth Proportional to 485,717.40, 728,576.10 and 456,168.60

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Solution

The fourth proportional to 485,717.40, 728,576.10 and 456,168.60 is: 684,252.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,717.40 : 728,576.10 = 456,168.60 : x
  2. Step 2: Convert to fraction form
    485,717.40/728,576.10 = 456,168.60/x
  3. Step 3: Cross multiply
    485,717.40x = 728,576.10 × 456,168.60
  4. Step 4: Simplify right side
    485,717.40x = 332,353,539,530.46
  5. Step 5: Solve for x
    x = 332,353,539,530.46/485,717.40
  6. Step 6: Final answer
    x = 684,252.90

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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.