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Finding the Fourth Proportional to 1,375.77, 2,064.56 and 553.89

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Solution

The fourth proportional to 1,375.77, 2,064.56 and 553.89 is: 831.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,375.77 : 2,064.56 = 553.89 : x
  2. Step 2: Convert to fraction form
    1,375.77/2,064.56 = 553.89/x
  3. Step 3: Cross multiply
    1,375.77x = 2,064.56 × 553.89
  4. Step 4: Simplify right side
    1,375.77x = 1,143,536.37
  5. Step 5: Solve for x
    x = 1,143,536.37/1,375.77
  6. Step 6: Final answer
    x = 831.20

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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.