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Finding the Fourth Proportional to 1,058.06, 1,587.09 and 442.06

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Solution

The fourth proportional to 1,058.06, 1,587.09 and 442.06 is: 663.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,058.06 : 1,587.09 = 442.06 : x
  2. Step 2: Convert to fraction form
    1,058.06/1,587.09 = 442.06/x
  3. Step 3: Cross multiply
    1,058.06x = 1,587.09 × 442.06
  4. Step 4: Simplify right side
    1,058.06x = 701,589.01
  5. Step 5: Solve for x
    x = 701,589.01/1,058.06
  6. Step 6: Final answer
    x = 663.09

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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.