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Finding the Fourth Proportional to 1,770.50, 2,655.75 and 674.61

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Solution

The fourth proportional to 1,770.50, 2,655.75 and 674.61 is: 1,011.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,770.50 : 2,655.75 = 674.61 : x
  2. Step 2: Convert to fraction form
    1,770.50/2,655.75 = 674.61/x
  3. Step 3: Cross multiply
    1,770.50x = 2,655.75 × 674.61
  4. Step 4: Simplify right side
    1,770.50x = 1,791,595.51
  5. Step 5: Solve for x
    x = 1,791,595.51/1,770.50
  6. Step 6: Final answer
    x = 1,011.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.