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Finding the Fourth Proportional to 368,642.43, 553,178.70 and 155,397.38

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Solution

The fourth proportional to 368,642.43, 553,178.70 and 155,397.38 is: 233,186.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,642.43 : 553,178.70 = 155,397.38 : x
  2. Step 2: Convert to fraction form
    368,642.43/553,178.70 = 155,397.38/x
  3. Step 3: Cross multiply
    368,642.43x = 553,178.70 × 155,397.38
  4. Step 4: Simplify right side
    368,642.43x = 85,962,517,885.91
  5. Step 5: Solve for x
    x = 85,962,517,885.91/368,642.43
  6. Step 6: Final answer
    x = 233,186.72

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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.