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Finding the Fourth Proportional to 502.70, 755.54 and 489.07

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Solution

The fourth proportional to 502.70, 755.54 and 489.07 is: 735.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.70 : 755.54 = 489.07 : x
  2. Step 2: Convert to fraction form
    502.70/755.54 = 489.07/x
  3. Step 3: Cross multiply
    502.70x = 755.54 × 489.07
  4. Step 4: Simplify right side
    502.70x = 369,509.45
  5. Step 5: Solve for x
    x = 369,509.45/502.70
  6. Step 6: Final answer
    x = 735.05

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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.