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Finding the Fourth Proportional to 869.32, 1,199.69 and 476.36

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Solution

The fourth proportional to 869.32, 1,199.69 and 476.36 is: 657.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    869.32 : 1,199.69 = 476.36 : x
  2. Step 2: Convert to fraction form
    869.32/1,199.69 = 476.36/x
  3. Step 3: Cross multiply
    869.32x = 1,199.69 × 476.36
  4. Step 4: Simplify right side
    869.32x = 571,481.95
  5. Step 5: Solve for x
    x = 571,481.95/869.32
  6. Step 6: Final answer
    x = 657.39

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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.