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Finding the Fourth Proportional to 711.02, 1,065.92 and 581.02

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Solution

The fourth proportional to 711.02, 1,065.92 and 581.02 is: 871.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.02 : 1,065.92 = 581.02 : x
  2. Step 2: Convert to fraction form
    711.02/1,065.92 = 581.02/x
  3. Step 3: Cross multiply
    711.02x = 1,065.92 × 581.02
  4. Step 4: Simplify right side
    711.02x = 619,320.84
  5. Step 5: Solve for x
    x = 619,320.84/711.02
  6. Step 6: Final answer
    x = 871.03

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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.