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Finding the Fourth Proportional to 3,031.50, 4,547.49 and 979.50

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Solution

The fourth proportional to 3,031.50, 4,547.49 and 979.50 is: 1,469.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,031.50 : 4,547.49 = 979.50 : x
  2. Step 2: Convert to fraction form
    3,031.50/4,547.49 = 979.50/x
  3. Step 3: Cross multiply
    3,031.50x = 4,547.49 × 979.50
  4. Step 4: Simplify right side
    3,031.50x = 4,454,266.46
  5. Step 5: Solve for x
    x = 4,454,266.46/3,031.50
  6. Step 6: Final answer
    x = 1,469.33

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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.