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Finding the Fourth Proportional to 279,379.73, 385,501.16 and 156,878.45

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Solution

The fourth proportional to 279,379.73, 385,501.16 and 156,878.45 is: 216,468.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,379.73 : 385,501.16 = 156,878.45 : x
  2. Step 2: Convert to fraction form
    279,379.73/385,501.16 = 156,878.45/x
  3. Step 3: Cross multiply
    279,379.73x = 385,501.16 × 156,878.45
  4. Step 4: Simplify right side
    279,379.73x = 60,476,825,650.32
  5. Step 5: Solve for x
    x = 60,476,825,650.32/279,379.73
  6. Step 6: Final answer
    x = 216,468.19

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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.