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Finding the Fourth Proportional to 632.84, 874.95 and 485.96

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Solution

The fourth proportional to 632.84, 874.95 and 485.96 is: 671.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    632.84 : 874.95 = 485.96 : x
  2. Step 2: Convert to fraction form
    632.84/874.95 = 485.96/x
  3. Step 3: Cross multiply
    632.84x = 874.95 × 485.96
  4. Step 4: Simplify right side
    632.84x = 425,190.70
  5. Step 5: Solve for x
    x = 425,190.70/632.84
  6. Step 6: Final answer
    x = 671.88

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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.