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Finding the Fourth Proportional to 392,931.54, 542,258.82 and 220,879.44

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Solution

The fourth proportional to 392,931.54, 542,258.82 and 220,879.44 is: 304,821.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,931.54 : 542,258.82 = 220,879.44 : x
  2. Step 2: Convert to fraction form
    392,931.54/542,258.82 = 220,879.44/x
  3. Step 3: Cross multiply
    392,931.54x = 542,258.82 × 220,879.44
  4. Step 4: Simplify right side
    392,931.54x = 119,773,824,496.66
  5. Step 5: Solve for x
    x = 119,773,824,496.66/392,931.54
  6. Step 6: Final answer
    x = 304,821.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.