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Finding the Fourth Proportional to 1,491.11, 2,058.48 and 931.89

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Solution

The fourth proportional to 1,491.11, 2,058.48 and 931.89 is: 1,286.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,491.11 : 2,058.48 = 931.89 : x
  2. Step 2: Convert to fraction form
    1,491.11/2,058.48 = 931.89/x
  3. Step 3: Cross multiply
    1,491.11x = 2,058.48 × 931.89
  4. Step 4: Simplify right side
    1,491.11x = 1,918,276.93
  5. Step 5: Solve for x
    x = 1,918,276.93/1,491.11
  6. Step 6: Final answer
    x = 1,286.48

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.