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Finding the Fourth Proportional to 711.12, 1,061.94 and 674.67

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Solution

The fourth proportional to 711.12, 1,061.94 and 674.67 is: 1,007.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.12 : 1,061.94 = 674.67 : x
  2. Step 2: Convert to fraction form
    711.12/1,061.94 = 674.67/x
  3. Step 3: Cross multiply
    711.12x = 1,061.94 × 674.67
  4. Step 4: Simplify right side
    711.12x = 716,459.06
  5. Step 5: Solve for x
    x = 716,459.06/711.12
  6. Step 6: Final answer
    x = 1,007.51

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.