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Finding the Fourth Proportional to 279,442.80, 385,619.40 and 152,110.80

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Solution

The fourth proportional to 279,442.80, 385,619.40 and 152,110.80 is: 209,906.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,442.80 : 385,619.40 = 152,110.80 : x
  2. Step 2: Convert to fraction form
    279,442.80/385,619.40 = 152,110.80/x
  3. Step 3: Cross multiply
    279,442.80x = 385,619.40 × 152,110.80
  4. Step 4: Simplify right side
    279,442.80x = 58,656,875,429.52
  5. Step 5: Solve for x
    x = 58,656,875,429.52/279,442.80
  6. Step 6: Final answer
    x = 209,906.55

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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.