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Finding the Fourth Proportional to 279,345.33, 385,505.28 and 158,491.71

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Solution

The fourth proportional to 279,345.33, 385,505.28 and 158,491.71 is: 218,723.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,345.33 : 385,505.28 = 158,491.71 : x
  2. Step 2: Convert to fraction form
    279,345.33/385,505.28 = 158,491.71/x
  3. Step 3: Cross multiply
    279,345.33x = 385,505.28 × 158,491.71
  4. Step 4: Simplify right side
    279,345.33x = 61,099,391,041.23
  5. Step 5: Solve for x
    x = 61,099,391,041.23/279,345.33
  6. Step 6: Final answer
    x = 218,723.51

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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.