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Finding the Fourth Proportional to 485,655.83, 728,483.74 and 406,923.83

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Solution

The fourth proportional to 485,655.83, 728,483.74 and 406,923.83 is: 610,385.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,655.83 : 728,483.74 = 406,923.83 : x
  2. Step 2: Convert to fraction form
    485,655.83/728,483.74 = 406,923.83/x
  3. Step 3: Cross multiply
    485,655.83x = 728,483.74 × 406,923.83
  4. Step 4: Simplify right side
    485,655.83x = 296,437,388,913.80
  5. Step 5: Solve for x
    x = 296,437,388,913.80/485,655.83
  6. Step 6: Final answer
    x = 610,385.74

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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.