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Finding the Fourth Proportional to 485,419.80, 728,000.10 and 148,459.80

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Solution

The fourth proportional to 485,419.80, 728,000.10 and 148,459.80 is: 222,650.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,419.80 : 728,000.10 = 148,459.80 : x
  2. Step 2: Convert to fraction form
    485,419.80/728,000.10 = 148,459.80/x
  3. Step 3: Cross multiply
    485,419.80x = 728,000.10 × 148,459.80
  4. Step 4: Simplify right side
    485,419.80x = 108,078,749,245.98
  5. Step 5: Solve for x
    x = 108,078,749,245.98/485,419.80
  6. Step 6: Final answer
    x = 222,650.06

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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.