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Finding the Fourth Proportional to 691.99, 956.31 and 567.45

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Solution

The fourth proportional to 691.99, 956.31 and 567.45 is: 784.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.99 : 956.31 = 567.45 : x
  2. Step 2: Convert to fraction form
    691.99/956.31 = 567.45/x
  3. Step 3: Cross multiply
    691.99x = 956.31 × 567.45
  4. Step 4: Simplify right side
    691.99x = 542,658.11
  5. Step 5: Solve for x
    x = 542,658.11/691.99
  6. Step 6: Final answer
    x = 784.20

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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.