Home / 1,058.20-1,587.30-936.70

Finding the Fourth Proportional to 1,058.20, 1,587.30 and 936.70

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Solution

The fourth proportional to 1,058.20, 1,587.30 and 936.70 is: 1,405.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,058.20 : 1,587.30 = 936.70 : x
  2. Step 2: Convert to fraction form
    1,058.20/1,587.30 = 936.70/x
  3. Step 3: Cross multiply
    1,058.20x = 1,587.30 × 936.70
  4. Step 4: Simplify right side
    1,058.20x = 1,486,823.91
  5. Step 5: Solve for x
    x = 1,486,823.91/1,058.20
  6. Step 6: Final answer
    x = 1,405.05

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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.