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Finding the Fourth Proportional to 690.94, 950.70 and 674.53

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Solution

The fourth proportional to 690.94, 950.70 and 674.53 is: 928.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    690.94 : 950.70 = 674.53 : x
  2. Step 2: Convert to fraction form
    690.94/950.70 = 674.53/x
  3. Step 3: Cross multiply
    690.94x = 950.70 × 674.53
  4. Step 4: Simplify right side
    690.94x = 641,275.67
  5. Step 5: Solve for x
    x = 641,275.67/690.94
  6. Step 6: Final answer
    x = 928.12

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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.