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Finding the Fourth Proportional to 1,778, 2,666.87 and 737.61

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Solution

The fourth proportional to 1,778, 2,666.87 and 737.61 is: 1,106.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,778 : 2,666.87 = 737.61 : x
  2. Step 2: Convert to fraction form
    1,778/2,666.87 = 737.61/x
  3. Step 3: Cross multiply
    1,778x = 2,666.87 × 737.61
  4. Step 4: Simplify right side
    1,778x = 1,967,109.98
  5. Step 5: Solve for x
    x = 1,967,109.98/1,778
  6. Step 6: Final answer
    x = 1,106.36

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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.