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Finding the Fourth Proportional to 881.64, 1,217.34 and 567.36

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Solution

The fourth proportional to 881.64, 1,217.34 and 567.36 is: 783.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.64 : 1,217.34 = 567.36 : x
  2. Step 2: Convert to fraction form
    881.64/1,217.34 = 567.36/x
  3. Step 3: Cross multiply
    881.64x = 1,217.34 × 567.36
  4. Step 4: Simplify right side
    881.64x = 690,670.02
  5. Step 5: Solve for x
    x = 690,670.02/881.64
  6. Step 6: Final answer
    x = 783.39

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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.