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Finding the Fourth Proportional to 485,770.30, 728,655.45 and 148,810.30

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Solution

The fourth proportional to 485,770.30, 728,655.45 and 148,810.30 is: 223,215.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,770.30 : 728,655.45 = 148,810.30 : x
  2. Step 2: Convert to fraction form
    485,770.30/728,655.45 = 148,810.30/x
  3. Step 3: Cross multiply
    485,770.30x = 728,655.45 × 148,810.30
  4. Step 4: Simplify right side
    485,770.30x = 108,431,436,111.14
  5. Step 5: Solve for x
    x = 108,431,436,111.14/485,770.30
  6. Step 6: Final answer
    x = 223,215.45

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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.