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Finding the Fourth Proportional to 392,909.77, 542,280.71 and 231,804.41

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Solution

The fourth proportional to 392,909.77, 542,280.71 and 231,804.41 is: 319,928.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,909.77 : 542,280.71 = 231,804.41 : x
  2. Step 2: Convert to fraction form
    392,909.77/542,280.71 = 231,804.41/x
  3. Step 3: Cross multiply
    392,909.77x = 542,280.71 × 231,804.41
  4. Step 4: Simplify right side
    392,909.77x = 125,703,060,035.93
  5. Step 5: Solve for x
    x = 125,703,060,035.93/392,909.77
  6. Step 6: Final answer
    x = 319,928.57

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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.