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Finding the Fourth Proportional to 2,339.11, 3,508.26 and 778.87

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Solution

The fourth proportional to 2,339.11, 3,508.26 and 778.87 is: 1,168.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,339.11 : 3,508.26 = 778.87 : x
  2. Step 2: Convert to fraction form
    2,339.11/3,508.26 = 778.87/x
  3. Step 3: Cross multiply
    2,339.11x = 3,508.26 × 778.87
  4. Step 4: Simplify right side
    2,339.11x = 2,732,478.47
  5. Step 5: Solve for x
    x = 2,732,478.47/2,339.11
  6. Step 6: Final answer
    x = 1,168.17

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1.5x scale

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.