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Finding the Fourth Proportional to 956.45, 1,319.40 and 563.24

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Solution

The fourth proportional to 956.45, 1,319.40 and 563.24 is: 776.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.45 : 1,319.40 = 563.24 : x
  2. Step 2: Convert to fraction form
    956.45/1,319.40 = 563.24/x
  3. Step 3: Cross multiply
    956.45x = 1,319.40 × 563.24
  4. Step 4: Simplify right side
    956.45x = 743,142.15
  5. Step 5: Solve for x
    x = 743,142.15/956.45
  6. Step 6: Final answer
    x = 776.98

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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.