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Finding the Fourth Proportional to 1,058.68, 1,587.72 and 668.10

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Solution

The fourth proportional to 1,058.68, 1,587.72 and 668.10 is: 1,001.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,058.68 : 1,587.72 = 668.10 : x
  2. Step 2: Convert to fraction form
    1,058.68/1,587.72 = 668.10/x
  3. Step 3: Cross multiply
    1,058.68x = 1,587.72 × 668.10
  4. Step 4: Simplify right side
    1,058.68x = 1,060,748.08
  5. Step 5: Solve for x
    x = 1,060,748.08/1,058.68
  6. Step 6: Final answer
    x = 1,001.95

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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.