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Finding the Fourth Proportional to 279,687.78, 385,965.62 and 152,360.64

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Solution

The fourth proportional to 279,687.78, 385,965.62 and 152,360.64 is: 210,255.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,687.78 : 385,965.62 = 152,360.64 : x
  2. Step 2: Convert to fraction form
    279,687.78/385,965.62 = 152,360.64/x
  3. Step 3: Cross multiply
    279,687.78x = 385,965.62 × 152,360.64
  4. Step 4: Simplify right side
    279,687.78x = 58,805,968,881.20
  5. Step 5: Solve for x
    x = 58,805,968,881.20/279,687.78
  6. Step 6: Final answer
    x = 210,255.77

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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.