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Finding the Fourth Proportional to 697.19, 962.08 and 398.39

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Solution

The fourth proportional to 697.19, 962.08 and 398.39 is: 549.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.19 : 962.08 = 398.39 : x
  2. Step 2: Convert to fraction form
    697.19/962.08 = 398.39/x
  3. Step 3: Cross multiply
    697.19x = 962.08 × 398.39
  4. Step 4: Simplify right side
    697.19x = 383,280.53
  5. Step 5: Solve for x
    x = 383,280.53/697.19
  6. Step 6: Final answer
    x = 549.75

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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.