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Finding the Fourth Proportional to 1,247.56, 1,871.64 and 554.20

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Solution

The fourth proportional to 1,247.56, 1,871.64 and 554.20 is: 831.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,247.56 : 1,871.64 = 554.20 : x
  2. Step 2: Convert to fraction form
    1,247.56/1,871.64 = 554.20/x
  3. Step 3: Cross multiply
    1,247.56x = 1,871.64 × 554.20
  4. Step 4: Simplify right side
    1,247.56x = 1,037,262.89
  5. Step 5: Solve for x
    x = 1,037,262.89/1,247.56
  6. Step 6: Final answer
    x = 831.43

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