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Finding the Fourth Proportional to 912.43, 1,259.82 and 712.77

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Solution

The fourth proportional to 912.43, 1,259.82 and 712.77 is: 984.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    912.43 : 1,259.82 = 712.77 : x
  2. Step 2: Convert to fraction form
    912.43/1,259.82 = 712.77/x
  3. Step 3: Cross multiply
    912.43x = 1,259.82 × 712.77
  4. Step 4: Simplify right side
    912.43x = 897,957.18
  5. Step 5: Solve for x
    x = 897,957.18/912.43
  6. Step 6: Final answer
    x = 984.14

Related Problems

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Half scale
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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.