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Finding the Fourth Proportional to 1,058.43, 1,587.47 and 288.75

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Solution

The fourth proportional to 1,058.43, 1,587.47 and 288.75 is: 433.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,058.43 : 1,587.47 = 288.75 : x
  2. Step 2: Convert to fraction form
    1,058.43/1,587.47 = 288.75/x
  3. Step 3: Cross multiply
    1,058.43x = 1,587.47 × 288.75
  4. Step 4: Simplify right side
    1,058.43x = 458,380.52
  5. Step 5: Solve for x
    x = 458,380.52/1,058.43
  6. Step 6: Final answer
    x = 433.08

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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.