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Finding the Fourth Proportional to 910.02, 1,255.86 and 713.20

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Solution

The fourth proportional to 910.02, 1,255.86 and 713.20 is: 984.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.02 : 1,255.86 = 713.20 : x
  2. Step 2: Convert to fraction form
    910.02/1,255.86 = 713.20/x
  3. Step 3: Cross multiply
    910.02x = 1,255.86 × 713.20
  4. Step 4: Simplify right side
    910.02x = 895,679.35
  5. Step 5: Solve for x
    x = 895,679.35/910.02
  6. Step 6: Final answer
    x = 984.24

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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.