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Finding the Fourth Proportional to 485,827.80, 728,741.70 and 153,403.80

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Solution

The fourth proportional to 485,827.80, 728,741.70 and 153,403.80 is: 230,105.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,827.80 : 728,741.70 = 153,403.80 : x
  2. Step 2: Convert to fraction form
    485,827.80/728,741.70 = 153,403.80/x
  3. Step 3: Cross multiply
    485,827.80x = 728,741.70 × 153,403.80
  4. Step 4: Simplify right side
    485,827.80x = 111,791,745,998.46
  5. Step 5: Solve for x
    x = 111,791,745,998.46/485,827.80
  6. Step 6: Final answer
    x = 230,105.70

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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.