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Finding the Fourth Proportional to 392,861.07, 542,133.90 and 240,155.01

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Solution

The fourth proportional to 392,861.07, 542,133.90 and 240,155.01 is: 331,405.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,861.07 : 542,133.90 = 240,155.01 : x
  2. Step 2: Convert to fraction form
    392,861.07/542,133.90 = 240,155.01/x
  3. Step 3: Cross multiply
    392,861.07x = 542,133.90 × 240,155.01
  4. Step 4: Simplify right side
    392,861.07x = 130,196,172,175.84
  5. Step 5: Solve for x
    x = 130,196,172,175.84/392,861.07
  6. Step 6: Final answer
    x = 331,405.13

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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.