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Finding the Fourth Proportional to 485,655.90, 728,483.85 and 464,660.70

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Solution

The fourth proportional to 485,655.90, 728,483.85 and 464,660.70 is: 696,991.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,655.90 : 728,483.85 = 464,660.70 : x
  2. Step 2: Convert to fraction form
    485,655.90/728,483.85 = 464,660.70/x
  3. Step 3: Cross multiply
    485,655.90x = 728,483.85 × 464,660.70
  4. Step 4: Simplify right side
    485,655.90x = 338,497,815,679.70
  5. Step 5: Solve for x
    x = 338,497,815,679.70/485,655.90
  6. Step 6: Final answer
    x = 696,991.05

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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.