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Finding the Fourth Proportional to 871.68, 1,307.36 and 584.88

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Solution

The fourth proportional to 871.68, 1,307.36 and 584.88 is: 877.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    871.68 : 1,307.36 = 584.88 : x
  2. Step 2: Convert to fraction form
    871.68/1,307.36 = 584.88/x
  3. Step 3: Cross multiply
    871.68x = 1,307.36 × 584.88
  4. Step 4: Simplify right side
    871.68x = 764,648.72
  5. Step 5: Solve for x
    x = 764,648.72/871.68
  6. Step 6: Final answer
    x = 877.21

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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.