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Finding the Fourth Proportional to 697.20, 961.68 and 434.88

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Solution

The fourth proportional to 697.20, 961.68 and 434.88 is: 599.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.20 : 961.68 = 434.88 : x
  2. Step 2: Convert to fraction form
    697.20/961.68 = 434.88/x
  3. Step 3: Cross multiply
    697.20x = 961.68 × 434.88
  4. Step 4: Simplify right side
    697.20x = 418,215.40
  5. Step 5: Solve for x
    x = 418,215.40/697.20
  6. Step 6: Final answer
    x = 599.85

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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.