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Finding the Fourth Proportional to 1,058.39, 1,587.20 and 364.88

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Solution

The fourth proportional to 1,058.39, 1,587.20 and 364.88 is: 547.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,058.39 : 1,587.20 = 364.88 : x
  2. Step 2: Convert to fraction form
    1,058.39/1,587.20 = 364.88/x
  3. Step 3: Cross multiply
    1,058.39x = 1,587.20 × 364.88
  4. Step 4: Simplify right side
    1,058.39x = 579,129.14
  5. Step 5: Solve for x
    x = 579,129.14/1,058.39
  6. Step 6: Final answer
    x = 547.18

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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.