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Finding the Fourth Proportional to 658,191, 987,286.50 and 159,555

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Solution

The fourth proportional to 658,191, 987,286.50 and 159,555 is: 239,332.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,191 : 987,286.50 = 159,555 : x
  2. Step 2: Convert to fraction form
    658,191/987,286.50 = 159,555/x
  3. Step 3: Cross multiply
    658,191x = 987,286.50 × 159,555
  4. Step 4: Simplify right side
    658,191x = 157,526,497,507.50
  5. Step 5: Solve for x
    x = 157,526,497,507.50/658,191
  6. Step 6: Final answer
    x = 239,332.50

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Half scale
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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.