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Finding the Fourth Proportional to 403,349.40, 605,081.70 and 137,122.20

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Solution

The fourth proportional to 403,349.40, 605,081.70 and 137,122.20 is: 205,702.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,349.40 : 605,081.70 = 137,122.20 : x
  2. Step 2: Convert to fraction form
    403,349.40/605,081.70 = 137,122.20/x
  3. Step 3: Cross multiply
    403,349.40x = 605,081.70 × 137,122.20
  4. Step 4: Simplify right side
    403,349.40x = 82,970,133,883.74
  5. Step 5: Solve for x
    x = 82,970,133,883.74/403,349.40
  6. Step 6: Final answer
    x = 205,702.88

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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.