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Finding the Fourth Proportional to 956.74, 1,319.80 and 563.50

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Solution

The fourth proportional to 956.74, 1,319.80 and 563.50 is: 777.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.74 : 1,319.80 = 563.50 : x
  2. Step 2: Convert to fraction form
    956.74/1,319.80 = 563.50/x
  3. Step 3: Cross multiply
    956.74x = 1,319.80 × 563.50
  4. Step 4: Simplify right side
    956.74x = 743,707.30
  5. Step 5: Solve for x
    x = 743,707.30/956.74
  6. Step 6: Final answer
    x = 777.33

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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.