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Finding the Fourth Proportional to 690.55, 953.17 and 410.90

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Solution

The fourth proportional to 690.55, 953.17 and 410.90 is: 567.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    690.55 : 953.17 = 410.90 : x
  2. Step 2: Convert to fraction form
    690.55/953.17 = 410.90/x
  3. Step 3: Cross multiply
    690.55x = 953.17 × 410.90
  4. Step 4: Simplify right side
    690.55x = 391,651.76
  5. Step 5: Solve for x
    x = 391,651.76/690.55
  6. Step 6: Final answer
    x = 567.16

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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.