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Finding the Fourth Proportional to 632.48, 872.15 and 492.35

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Solution

The fourth proportional to 632.48, 872.15 and 492.35 is: 678.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    632.48 : 872.15 = 492.35 : x
  2. Step 2: Convert to fraction form
    632.48/872.15 = 492.35/x
  3. Step 3: Cross multiply
    632.48x = 872.15 × 492.35
  4. Step 4: Simplify right side
    632.48x = 429,396.23
  5. Step 5: Solve for x
    x = 429,396.23/632.48
  6. Step 6: Final answer
    x = 678.91

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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.