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Finding the Fourth Proportional to 770.97, 1,061.94 and 549.51

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Solution

The fourth proportional to 770.97, 1,061.94 and 549.51 is: 756.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    770.97 : 1,061.94 = 549.51 : x
  2. Step 2: Convert to fraction form
    770.97/1,061.94 = 549.51/x
  3. Step 3: Cross multiply
    770.97x = 1,061.94 × 549.51
  4. Step 4: Simplify right side
    770.97x = 583,546.65
  5. Step 5: Solve for x
    x = 583,546.65/770.97
  6. Step 6: Final answer
    x = 756.90

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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.