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Finding the Fourth Proportional to 279,458, 385,681.20 and 158,631.92

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Solution

The fourth proportional to 279,458, 385,681.20 and 158,631.92 is: 218,928.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,458 : 385,681.20 = 158,631.92 : x
  2. Step 2: Convert to fraction form
    279,458/385,681.20 = 158,631.92/x
  3. Step 3: Cross multiply
    279,458x = 385,681.20 × 158,631.92
  4. Step 4: Simplify right side
    279,458x = 61,181,349,263.90
  5. Step 5: Solve for x
    x = 61,181,349,263.90/279,458
  6. Step 6: Final answer
    x = 218,928.60

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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.