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Finding the Fourth Proportional to 638,717.90, 958,230.74 and 239,362.20

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Solution

The fourth proportional to 638,717.90, 958,230.74 and 239,362.20 is: 359,100.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,717.90 : 958,230.74 = 239,362.20 : x
  2. Step 2: Convert to fraction form
    638,717.90/958,230.74 = 239,362.20/x
  3. Step 3: Cross multiply
    638,717.90x = 958,230.74 × 239,362.20
  4. Step 4: Simplify right side
    638,717.90x = 229,364,218,034.03
  5. Step 5: Solve for x
    x = 229,364,218,034.03/638,717.90
  6. Step 6: Final answer
    x = 359,100.97

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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.