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Finding the Fourth Proportional to 392,868.75, 542,133.36 and 231,686.85

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Solution

The fourth proportional to 392,868.75, 542,133.36 and 231,686.85 is: 319,712.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,868.75 : 542,133.36 = 231,686.85 : x
  2. Step 2: Convert to fraction form
    392,868.75/542,133.36 = 231,686.85/x
  3. Step 3: Cross multiply
    392,868.75x = 542,133.36 × 231,686.85
  4. Step 4: Simplify right side
    392,868.75x = 125,605,170,458.32
  5. Step 5: Solve for x
    x = 125,605,170,458.32/392,868.75
  6. Step 6: Final answer
    x = 319,712.81

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1.5x scale

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.