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Finding the Fourth Proportional to 686.55, 948.13 and 437.98

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Solution

The fourth proportional to 686.55, 948.13 and 437.98 is: 604.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    686.55 : 948.13 = 437.98 : x
  2. Step 2: Convert to fraction form
    686.55/948.13 = 437.98/x
  3. Step 3: Cross multiply
    686.55x = 948.13 × 437.98
  4. Step 4: Simplify right side
    686.55x = 415,261.98
  5. Step 5: Solve for x
    x = 415,261.98/686.55
  6. Step 6: Final answer
    x = 604.85

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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.