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Finding the Fourth Proportional to 279,318.57, 385,468.33 and 158,464.95

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Solution

The fourth proportional to 279,318.57, 385,468.33 and 158,464.95 is: 218,686.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,318.57 : 385,468.33 = 158,464.95 : x
  2. Step 2: Convert to fraction form
    279,318.57/385,468.33 = 158,464.95/x
  3. Step 3: Cross multiply
    279,318.57x = 385,468.33 × 158,464.95
  4. Step 4: Simplify right side
    279,318.57x = 61,083,219,640.03
  5. Step 5: Solve for x
    x = 61,083,219,640.03/279,318.57
  6. Step 6: Final answer
    x = 218,686.57

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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.