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Finding the Fourth Proportional to 696.20, 961.02 and 434.28

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Solution

The fourth proportional to 696.20, 961.02 and 434.28 is: 599.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.20 : 961.02 = 434.28 : x
  2. Step 2: Convert to fraction form
    696.20/961.02 = 434.28/x
  3. Step 3: Cross multiply
    696.20x = 961.02 × 434.28
  4. Step 4: Simplify right side
    696.20x = 417,351.77
  5. Step 5: Solve for x
    x = 417,351.77/696.20
  6. Step 6: Final answer
    x = 599.47

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Double scale
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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.