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Finding the Fourth Proportional to 279,029.72, 385,076.76 and 151,702.58

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Solution

The fourth proportional to 279,029.72, 385,076.76 and 151,702.58 is: 209,358.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,029.72 : 385,076.76 = 151,702.58 : x
  2. Step 2: Convert to fraction form
    279,029.72/385,076.76 = 151,702.58/x
  3. Step 3: Cross multiply
    279,029.72x = 385,076.76 × 151,702.58
  4. Step 4: Simplify right side
    279,029.72x = 58,417,137,990.04
  5. Step 5: Solve for x
    x = 58,417,137,990.04/279,029.72
  6. Step 6: Final answer
    x = 209,358.12

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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.