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Finding the Fourth Proportional to 956.57, 1,320.23 and 558.29

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Solution

The fourth proportional to 956.57, 1,320.23 and 558.29 is: 770.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.57 : 1,320.23 = 558.29 : x
  2. Step 2: Convert to fraction form
    956.57/1,320.23 = 558.29/x
  3. Step 3: Cross multiply
    956.57x = 1,320.23 × 558.29
  4. Step 4: Simplify right side
    956.57x = 737,075.90
  5. Step 5: Solve for x
    x = 737,075.90/956.57
  6. Step 6: Final answer
    x = 770.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.