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Finding the Fourth Proportional to 634.57, 874.20 and 603.30

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Solution

The fourth proportional to 634.57, 874.20 and 603.30 is: 831.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.57 : 874.20 = 603.30 : x
  2. Step 2: Convert to fraction form
    634.57/874.20 = 603.30/x
  3. Step 3: Cross multiply
    634.57x = 874.20 × 603.30
  4. Step 4: Simplify right side
    634.57x = 527,409.95
  5. Step 5: Solve for x
    x = 527,409.95/634.57
  6. Step 6: Final answer
    x = 831.13

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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.