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Finding the Fourth Proportional to 711.89, 1,068.10 and 249.72

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Solution

The fourth proportional to 711.89, 1,068.10 and 249.72 is: 374.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.89 : 1,068.10 = 249.72 : x
  2. Step 2: Convert to fraction form
    711.89/1,068.10 = 249.72/x
  3. Step 3: Cross multiply
    711.89x = 1,068.10 × 249.72
  4. Step 4: Simplify right side
    711.89x = 266,721.22
  5. Step 5: Solve for x
    x = 266,721.22/711.89
  6. Step 6: Final answer
    x = 374.67

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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.