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Finding the Fourth Proportional to 871.16, 1,307.82 and 581.72

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Solution

The fourth proportional to 871.16, 1,307.82 and 581.72 is: 873.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    871.16 : 1,307.82 = 581.72 : x
  2. Step 2: Convert to fraction form
    871.16/1,307.82 = 581.72/x
  3. Step 3: Cross multiply
    871.16x = 1,307.82 × 581.72
  4. Step 4: Simplify right side
    871.16x = 760,785.05
  5. Step 5: Solve for x
    x = 760,785.05/871.16
  6. Step 6: Final answer
    x = 873.30

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