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Finding the Fourth Proportional to 874.25, 1,206.74 and 563.75

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Solution

The fourth proportional to 874.25, 1,206.74 and 563.75 is: 778.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    874.25 : 1,206.74 = 563.75 : x
  2. Step 2: Convert to fraction form
    874.25/1,206.74 = 563.75/x
  3. Step 3: Cross multiply
    874.25x = 1,206.74 × 563.75
  4. Step 4: Simplify right side
    874.25x = 680,296.86
  5. Step 5: Solve for x
    x = 680,296.86/874.25
  6. Step 6: Final answer
    x = 778.15

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Double scale
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1.5x scale

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.