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Finding the Fourth Proportional to 279,605.78, 385,860.38 and 152,281.28

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Solution

The fourth proportional to 279,605.78, 385,860.38 and 152,281.28 is: 210,150.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,605.78 : 385,860.38 = 152,281.28 : x
  2. Step 2: Convert to fraction form
    279,605.78/385,860.38 = 152,281.28/x
  3. Step 3: Cross multiply
    279,605.78x = 385,860.38 × 152,281.28
  4. Step 4: Simplify right side
    279,605.78x = 58,759,309,876.98
  5. Step 5: Solve for x
    x = 58,759,309,876.98/279,605.78
  6. Step 6: Final answer
    x = 210,150.56

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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.