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Finding the Fourth Proportional to 948.37, 1,422.12 and 400.25

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Solution

The fourth proportional to 948.37, 1,422.12 and 400.25 is: 600.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.37 : 1,422.12 = 400.25 : x
  2. Step 2: Convert to fraction form
    948.37/1,422.12 = 400.25/x
  3. Step 3: Cross multiply
    948.37x = 1,422.12 × 400.25
  4. Step 4: Simplify right side
    948.37x = 569,203.53
  5. Step 5: Solve for x
    x = 569,203.53/948.37
  6. Step 6: Final answer
    x = 600.19

Related Problems

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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.