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Finding the Fourth Proportional to 1,058.31, 1,588.65 and 620.08

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Solution

The fourth proportional to 1,058.31, 1,588.65 and 620.08 is: 930.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,058.31 : 1,588.65 = 620.08 : x
  2. Step 2: Convert to fraction form
    1,058.31/1,588.65 = 620.08/x
  3. Step 3: Cross multiply
    1,058.31x = 1,588.65 × 620.08
  4. Step 4: Simplify right side
    1,058.31x = 985,083.80
  5. Step 5: Solve for x
    x = 985,083.80/1,058.31
  6. Step 6: Final answer
    x = 930.81

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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.