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Finding the Fourth Proportional to 634.95, 874.80 and 565.02

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Solution

The fourth proportional to 634.95, 874.80 and 565.02 is: 778.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.95 : 874.80 = 565.02 : x
  2. Step 2: Convert to fraction form
    634.95/874.80 = 565.02/x
  3. Step 3: Cross multiply
    634.95x = 874.80 × 565.02
  4. Step 4: Simplify right side
    634.95x = 494,279.50
  5. Step 5: Solve for x
    x = 494,279.50/634.95
  6. Step 6: Final answer
    x = 778.45

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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.