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Finding the Fourth Proportional to 485,688.40, 728,532.60 and 456,139.60

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Solution

The fourth proportional to 485,688.40, 728,532.60 and 456,139.60 is: 684,209.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,688.40 : 728,532.60 = 456,139.60 : x
  2. Step 2: Convert to fraction form
    485,688.40/728,532.60 = 456,139.60/x
  3. Step 3: Cross multiply
    485,688.40x = 728,532.60 × 456,139.60
  4. Step 4: Simplify right side
    485,688.40x = 332,312,568,750.96
  5. Step 5: Solve for x
    x = 332,312,568,750.96/485,688.40
  6. Step 6: Final answer
    x = 684,209.40

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Similar ratio
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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.