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Finding the Fourth Proportional to 392,887.07, 542,229.12 and 218,474.69

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Solution

The fourth proportional to 392,887.07, 542,229.12 and 218,474.69 is: 301,520.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,887.07 : 542,229.12 = 218,474.69 : x
  2. Step 2: Convert to fraction form
    392,887.07/542,229.12 = 218,474.69/x
  3. Step 3: Cross multiply
    392,887.07x = 542,229.12 × 218,474.69
  4. Step 4: Simplify right side
    392,887.07x = 118,463,341,686.58
  5. Step 5: Solve for x
    x = 118,463,341,686.58/392,887.07
  6. Step 6: Final answer
    x = 301,520.08

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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.