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Finding the Fourth Proportional to 279,481.59, 385,686.36 and 152,158.50

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Solution

The fourth proportional to 279,481.59, 385,686.36 and 152,158.50 is: 209,979.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,481.59 : 385,686.36 = 152,158.50 : x
  2. Step 2: Convert to fraction form
    279,481.59/385,686.36 = 152,158.50/x
  3. Step 3: Cross multiply
    279,481.59x = 385,686.36 × 152,158.50
  4. Step 4: Simplify right side
    279,481.59x = 58,685,458,008.06
  5. Step 5: Solve for x
    x = 58,685,458,008.06/279,481.59
  6. Step 6: Final answer
    x = 209,979.69

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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.