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Finding the Fourth Proportional to 1,058.30, 1,587.45 and 901.70

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Solution

The fourth proportional to 1,058.30, 1,587.45 and 901.70 is: 1,352.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,058.30 : 1,587.45 = 901.70 : x
  2. Step 2: Convert to fraction form
    1,058.30/1,587.45 = 901.70/x
  3. Step 3: Cross multiply
    1,058.30x = 1,587.45 × 901.70
  4. Step 4: Simplify right side
    1,058.30x = 1,431,403.67
  5. Step 5: Solve for x
    x = 1,431,403.67/1,058.30
  6. Step 6: Final answer
    x = 1,352.55

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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.