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Finding the Fourth Proportional to 882.12, 1,322.64 and 394.50

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Solution

The fourth proportional to 882.12, 1,322.64 and 394.50 is: 591.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    882.12 : 1,322.64 = 394.50 : x
  2. Step 2: Convert to fraction form
    882.12/1,322.64 = 394.50/x
  3. Step 3: Cross multiply
    882.12x = 1,322.64 × 394.50
  4. Step 4: Simplify right side
    882.12x = 521,781.48
  5. Step 5: Solve for x
    x = 521,781.48/882.12
  6. Step 6: Final answer
    x = 591.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.