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Finding the Fourth Proportional to 308,260.50, 462,390.75 and 86,644.50

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Solution

The fourth proportional to 308,260.50, 462,390.75 and 86,644.50 is: 129,966.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,260.50 : 462,390.75 = 86,644.50 : x
  2. Step 2: Convert to fraction form
    308,260.50/462,390.75 = 86,644.50/x
  3. Step 3: Cross multiply
    308,260.50x = 462,390.75 × 86,644.50
  4. Step 4: Simplify right side
    308,260.50x = 40,063,615,338.38
  5. Step 5: Solve for x
    x = 40,063,615,338.38/308,260.50
  6. Step 6: Final answer
    x = 129,966.75

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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.