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Finding the Fourth Proportional to 261,576.51, 392,265.17 and 154,990.55

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Solution

The fourth proportional to 261,576.51, 392,265.17 and 154,990.55 is: 232,426.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,576.51 : 392,265.17 = 154,990.55 : x
  2. Step 2: Convert to fraction form
    261,576.51/392,265.17 = 154,990.55/x
  3. Step 3: Cross multiply
    261,576.51x = 392,265.17 × 154,990.55
  4. Step 4: Simplify right side
    261,576.51x = 60,797,394,444.14
  5. Step 5: Solve for x
    x = 60,797,394,444.14/261,576.51
  6. Step 6: Final answer
    x = 232,426.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.