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Finding the Fourth Proportional to 485,516.50, 728,274.75 and 153,092.50

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Solution

The fourth proportional to 485,516.50, 728,274.75 and 153,092.50 is: 229,638.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,516.50 : 728,274.75 = 153,092.50 : x
  2. Step 2: Convert to fraction form
    485,516.50/728,274.75 = 153,092.50/x
  3. Step 3: Cross multiply
    485,516.50x = 728,274.75 × 153,092.50
  4. Step 4: Simplify right side
    485,516.50x = 111,493,402,164.38
  5. Step 5: Solve for x
    x = 111,493,402,164.38/485,516.50
  6. Step 6: Final answer
    x = 229,638.75

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Double scale
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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.