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Finding the Fourth Proportional to 607.12, 910.78 and 398.95

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Solution

The fourth proportional to 607.12, 910.78 and 398.95 is: 598.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.12 : 910.78 = 398.95 : x
  2. Step 2: Convert to fraction form
    607.12/910.78 = 398.95/x
  3. Step 3: Cross multiply
    607.12x = 910.78 × 398.95
  4. Step 4: Simplify right side
    607.12x = 363,352.41
  5. Step 5: Solve for x
    x = 363,352.41/607.12
  6. Step 6: Final answer
    x = 598.49

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.