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Finding the Fourth Proportional to 948.30, 1,422.45 and 400.34

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Solution

The fourth proportional to 948.30, 1,422.45 and 400.34 is: 600.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.30 : 1,422.45 = 400.34 : x
  2. Step 2: Convert to fraction form
    948.30/1,422.45 = 400.34/x
  3. Step 3: Cross multiply
    948.30x = 1,422.45 × 400.34
  4. Step 4: Simplify right side
    948.30x = 569,463.63
  5. Step 5: Solve for x
    x = 569,463.63/948.30
  6. Step 6: Final answer
    x = 600.51

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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.