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Finding the Fourth Proportional to 697.01, 961.67 and 398.25

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Solution

The fourth proportional to 697.01, 961.67 and 398.25 is: 549.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.01 : 961.67 = 398.25 : x
  2. Step 2: Convert to fraction form
    697.01/961.67 = 398.25/x
  3. Step 3: Cross multiply
    697.01x = 961.67 × 398.25
  4. Step 4: Simplify right side
    697.01x = 382,986.07
  5. Step 5: Solve for x
    x = 382,986.07/697.01
  6. Step 6: Final answer
    x = 549.47

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Half scale
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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.