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Finding the Fourth Proportional to 386,178.44, 579,267.72 and 105,695.69

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Solution

The fourth proportional to 386,178.44, 579,267.72 and 105,695.69 is: 158,543.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,178.44 : 579,267.72 = 105,695.69 : x
  2. Step 2: Convert to fraction form
    386,178.44/579,267.72 = 105,695.69/x
  3. Step 3: Cross multiply
    386,178.44x = 579,267.72 × 105,695.69
  4. Step 4: Simplify right side
    386,178.44x = 61,226,098,463.79
  5. Step 5: Solve for x
    x = 61,226,098,463.79/386,178.44
  6. Step 6: Final answer
    x = 158,543.55

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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.