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Finding the Fourth Proportional to 208,053.10, 312,079.65 and 187,057.90

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Solution

The fourth proportional to 208,053.10, 312,079.65 and 187,057.90 is: 280,586.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,053.10 : 312,079.65 = 187,057.90 : x
  2. Step 2: Convert to fraction form
    208,053.10/312,079.65 = 187,057.90/x
  3. Step 3: Cross multiply
    208,053.10x = 312,079.65 × 187,057.90
  4. Step 4: Simplify right side
    208,053.10x = 58,376,963,961.74
  5. Step 5: Solve for x
    x = 58,376,963,961.74/208,053.10
  6. Step 6: Final answer
    x = 280,586.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.