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Finding the Fourth Proportional to 690.93, 950.22 and 549.38

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Solution

The fourth proportional to 690.93, 950.22 and 549.38 is: 755.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    690.93 : 950.22 = 549.38 : x
  2. Step 2: Convert to fraction form
    690.93/950.22 = 549.38/x
  3. Step 3: Cross multiply
    690.93x = 950.22 × 549.38
  4. Step 4: Simplify right side
    690.93x = 522,031.49
  5. Step 5: Solve for x
    x = 522,031.49/690.93
  6. Step 6: Final answer
    x = 755.55

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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.