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Finding the Fourth Proportional to 690.97, 953.49 and 543.96

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Solution

The fourth proportional to 690.97, 953.49 and 543.96 is: 750.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    690.97 : 953.49 = 543.96 : x
  2. Step 2: Convert to fraction form
    690.97/953.49 = 543.96/x
  3. Step 3: Cross multiply
    690.97x = 953.49 × 543.96
  4. Step 4: Simplify right side
    690.97x = 518,660.42
  5. Step 5: Solve for x
    x = 518,660.42/690.97
  6. Step 6: Final answer
    x = 750.63

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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.