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Finding the Fourth Proportional to 818.03, 1,126.34 and 713.13

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Solution

The fourth proportional to 818.03, 1,126.34 and 713.13 is: 981.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.03 : 1,126.34 = 713.13 : x
  2. Step 2: Convert to fraction form
    818.03/1,126.34 = 713.13/x
  3. Step 3: Cross multiply
    818.03x = 1,126.34 × 713.13
  4. Step 4: Simplify right side
    818.03x = 803,221.73
  5. Step 5: Solve for x
    x = 803,221.73/818.03
  6. Step 6: Final answer
    x = 981.89

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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.