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Finding the Fourth Proportional to 1,530.79, 2,294.61 and 871.81

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Solution

The fourth proportional to 1,530.79, 2,294.61 and 871.81 is: 1,306.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,530.79 : 2,294.61 = 871.81 : x
  2. Step 2: Convert to fraction form
    1,530.79/2,294.61 = 871.81/x
  3. Step 3: Cross multiply
    1,530.79x = 2,294.61 × 871.81
  4. Step 4: Simplify right side
    1,530.79x = 2,000,463.94
  5. Step 5: Solve for x
    x = 2,000,463.94/1,530.79
  6. Step 6: Final answer
    x = 1,306.82

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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.