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Finding the Fourth Proportional to 869.91, 1,199.39 and 574.71

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Solution

The fourth proportional to 869.91, 1,199.39 and 574.71 is: 792.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    869.91 : 1,199.39 = 574.71 : x
  2. Step 2: Convert to fraction form
    869.91/1,199.39 = 574.71/x
  3. Step 3: Cross multiply
    869.91x = 1,199.39 × 574.71
  4. Step 4: Simplify right side
    869.91x = 689,301.43
  5. Step 5: Solve for x
    x = 689,301.43/869.91
  6. Step 6: Final answer
    x = 792.38

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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.