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Finding the Fourth Proportional to 1,306.94, 1,959.46 and 613.24

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Solution

The fourth proportional to 1,306.94, 1,959.46 and 613.24 is: 919.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,306.94 : 1,959.46 = 613.24 : x
  2. Step 2: Convert to fraction form
    1,306.94/1,959.46 = 613.24/x
  3. Step 3: Cross multiply
    1,306.94x = 1,959.46 × 613.24
  4. Step 4: Simplify right side
    1,306.94x = 1,201,612.82
  5. Step 5: Solve for x
    x = 1,201,612.82/1,306.94
  6. Step 6: Final answer
    x = 919.41

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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.