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Finding the Fourth Proportional to 580.79, 871.71 and 307.09

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Solution

The fourth proportional to 580.79, 871.71 and 307.09 is: 460.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.79 : 871.71 = 307.09 : x
  2. Step 2: Convert to fraction form
    580.79/871.71 = 307.09/x
  3. Step 3: Cross multiply
    580.79x = 871.71 × 307.09
  4. Step 4: Simplify right side
    580.79x = 267,689.07
  5. Step 5: Solve for x
    x = 267,689.07/580.79
  6. Step 6: Final answer
    x = 460.91

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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.