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Finding the Fourth Proportional to 279,774.38, 386,076.54 and 158,915.28

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Solution

The fourth proportional to 279,774.38, 386,076.54 and 158,915.28 is: 219,296.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,774.38 : 386,076.54 = 158,915.28 : x
  2. Step 2: Convert to fraction form
    279,774.38/386,076.54 = 158,915.28/x
  3. Step 3: Cross multiply
    279,774.38x = 386,076.54 × 158,915.28
  4. Step 4: Simplify right side
    279,774.38x = 61,353,461,455.53
  5. Step 5: Solve for x
    x = 61,353,461,455.53/279,774.38
  6. Step 6: Final answer
    x = 219,296.21

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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.