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Finding the Fourth Proportional to 1,148.52, 1,722.94 and 379.08

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Solution

The fourth proportional to 1,148.52, 1,722.94 and 379.08 is: 568.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,148.52 : 1,722.94 = 379.08 : x
  2. Step 2: Convert to fraction form
    1,148.52/1,722.94 = 379.08/x
  3. Step 3: Cross multiply
    1,148.52x = 1,722.94 × 379.08
  4. Step 4: Simplify right side
    1,148.52x = 653,132.10
  5. Step 5: Solve for x
    x = 653,132.10/1,148.52
  6. Step 6: Final answer
    x = 568.67

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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.