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Finding the Fourth Proportional to 691.04, 953.60 and 380.56

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Solution

The fourth proportional to 691.04, 953.60 and 380.56 is: 525.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.04 : 953.60 = 380.56 : x
  2. Step 2: Convert to fraction form
    691.04/953.60 = 380.56/x
  3. Step 3: Cross multiply
    691.04x = 953.60 × 380.56
  4. Step 4: Simplify right side
    691.04x = 362,902.02
  5. Step 5: Solve for x
    x = 362,902.02/691.04
  6. Step 6: Final answer
    x = 525.15

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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.