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Finding the Fourth Proportional to 279,462.68, 385,646.40 and 152,138.72

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Solution

The fourth proportional to 279,462.68, 385,646.40 and 152,138.72 is: 209,944.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,462.68 : 385,646.40 = 152,138.72 : x
  2. Step 2: Convert to fraction form
    279,462.68/385,646.40 = 152,138.72/x
  3. Step 3: Cross multiply
    279,462.68x = 385,646.40 × 152,138.72
  4. Step 4: Simplify right side
    279,462.68x = 58,671,749,668.61
  5. Step 5: Solve for x
    x = 58,671,749,668.61/279,462.68
  6. Step 6: Final answer
    x = 209,944.85

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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.