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Finding the Fourth Proportional to 1,256.15, 1,733.49 and 696.65

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Solution

The fourth proportional to 1,256.15, 1,733.49 and 696.65 is: 961.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,256.15 : 1,733.49 = 696.65 : x
  2. Step 2: Convert to fraction form
    1,256.15/1,733.49 = 696.65/x
  3. Step 3: Cross multiply
    1,256.15x = 1,733.49 × 696.65
  4. Step 4: Simplify right side
    1,256.15x = 1,207,635.81
  5. Step 5: Solve for x
    x = 1,207,635.81/1,256.15
  6. Step 6: Final answer
    x = 961.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.