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Finding the Fourth Proportional to 690.95, 953.55 and 454.97

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Solution

The fourth proportional to 690.95, 953.55 and 454.97 is: 627.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    690.95 : 953.55 = 454.97 : x
  2. Step 2: Convert to fraction form
    690.95/953.55 = 454.97/x
  3. Step 3: Cross multiply
    690.95x = 953.55 × 454.97
  4. Step 4: Simplify right side
    690.95x = 433,831.88
  5. Step 5: Solve for x
    x = 433,831.88/690.95
  6. Step 6: Final answer
    x = 627.88

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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.