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Finding the Fourth Proportional to 778.68, 1,168.56 and 346.08

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Solution

The fourth proportional to 778.68, 1,168.56 and 346.08 is: 519.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    778.68 : 1,168.56 = 346.08 : x
  2. Step 2: Convert to fraction form
    778.68/1,168.56 = 346.08/x
  3. Step 3: Cross multiply
    778.68x = 1,168.56 × 346.08
  4. Step 4: Simplify right side
    778.68x = 404,415.24
  5. Step 5: Solve for x
    x = 404,415.24/778.68
  6. Step 6: Final answer
    x = 519.36

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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.