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Finding the Fourth Proportional to 912.57, 1,259.25 and 514.17

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Solution

The fourth proportional to 912.57, 1,259.25 and 514.17 is: 709.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    912.57 : 1,259.25 = 514.17 : x
  2. Step 2: Convert to fraction form
    912.57/1,259.25 = 514.17/x
  3. Step 3: Cross multiply
    912.57x = 1,259.25 × 514.17
  4. Step 4: Simplify right side
    912.57x = 647,468.57
  5. Step 5: Solve for x
    x = 647,468.57/912.57
  6. Step 6: Final answer
    x = 709.50

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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.