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Finding the Fourth Proportional to 818.76, 1,130.18 and 731.28

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Solution

The fourth proportional to 818.76, 1,130.18 and 731.28 is: 1,009.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.76 : 1,130.18 = 731.28 : x
  2. Step 2: Convert to fraction form
    818.76/1,130.18 = 731.28/x
  3. Step 3: Cross multiply
    818.76x = 1,130.18 × 731.28
  4. Step 4: Simplify right side
    818.76x = 826,478.03
  5. Step 5: Solve for x
    x = 826,478.03/818.76
  6. Step 6: Final answer
    x = 1,009.43

Related Problems

Find fourth proportional to 409.38, 565.09 and 365.64
Half scale
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Double scale
Find fourth proportional to 819.76, 1,131.56 and 732.28
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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.