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Finding the Fourth Proportional to 1,058.11, 1,458.64 and 742.42

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Solution

The fourth proportional to 1,058.11, 1,458.64 and 742.42 is: 1,023.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,058.11 : 1,458.64 = 742.42 : x
  2. Step 2: Convert to fraction form
    1,058.11/1,458.64 = 742.42/x
  3. Step 3: Cross multiply
    1,058.11x = 1,458.64 × 742.42
  4. Step 4: Simplify right side
    1,058.11x = 1,082,925.36
  5. Step 5: Solve for x
    x = 1,082,925.36/1,058.11
  6. Step 6: Final answer
    x = 1,023.45

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Why These Related Problems?

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