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Finding the Fourth Proportional to 638,713.89, 958,224.74 and 239,358.20

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Solution

The fourth proportional to 638,713.89, 958,224.74 and 239,358.20 is: 359,094.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,713.89 : 958,224.74 = 239,358.20 : x
  2. Step 2: Convert to fraction form
    638,713.89/958,224.74 = 239,358.20/x
  3. Step 3: Cross multiply
    638,713.89x = 958,224.74 × 239,358.20
  4. Step 4: Simplify right side
    638,713.89x = 229,358,942,973.95
  5. Step 5: Solve for x
    x = 229,358,942,973.95/638,713.89
  6. Step 6: Final answer
    x = 359,094.97

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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.