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Finding the Fourth Proportional to 676, 933.12 and 469.12

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Solution

The fourth proportional to 676, 933.12 and 469.12 is: 647.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    676 : 933.12 = 469.12 : x
  2. Step 2: Convert to fraction form
    676/933.12 = 469.12/x
  3. Step 3: Cross multiply
    676x = 933.12 × 469.12
  4. Step 4: Simplify right side
    676x = 437,745.25
  5. Step 5: Solve for x
    x = 437,745.25/676
  6. Step 6: Final answer
    x = 647.55

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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.