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Finding the Fourth Proportional to 912.76, 1,260.11 and 614.50

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Solution

The fourth proportional to 912.76, 1,260.11 and 614.50 is: 848.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    912.76 : 1,260.11 = 614.50 : x
  2. Step 2: Convert to fraction form
    912.76/1,260.11 = 614.50/x
  3. Step 3: Cross multiply
    912.76x = 1,260.11 × 614.50
  4. Step 4: Simplify right side
    912.76x = 774,335.98
  5. Step 5: Solve for x
    x = 774,335.98/912.76
  6. Step 6: Final answer
    x = 848.35

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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.