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Finding the Fourth Proportional to 818.15, 1,129.01 and 566.33

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Solution

The fourth proportional to 818.15, 1,129.01 and 566.33 is: 781.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.15 : 1,129.01 = 566.33 : x
  2. Step 2: Convert to fraction form
    818.15/1,129.01 = 566.33/x
  3. Step 3: Cross multiply
    818.15x = 1,129.01 × 566.33
  4. Step 4: Simplify right side
    818.15x = 639,383.76
  5. Step 5: Solve for x
    x = 639,383.76/818.15
  6. Step 6: Final answer
    x = 781.50

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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.