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Finding the Fourth Proportional to 502.70, 753.98 and 137.50

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Solution

The fourth proportional to 502.70, 753.98 and 137.50 is: 206.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.70 : 753.98 = 137.50 : x
  2. Step 2: Convert to fraction form
    502.70/753.98 = 137.50/x
  3. Step 3: Cross multiply
    502.70x = 753.98 × 137.50
  4. Step 4: Simplify right side
    502.70x = 103,669.68
  5. Step 5: Solve for x
    x = 103,669.68/502.70
  6. Step 6: Final answer
    x = 206.23

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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.