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Finding the Fourth Proportional to 948.46, 1,422.25 and 400.35

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Solution

The fourth proportional to 948.46, 1,422.25 and 400.35 is: 600.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.46 : 1,422.25 = 400.35 : x
  2. Step 2: Convert to fraction form
    948.46/1,422.25 = 400.35/x
  3. Step 3: Cross multiply
    948.46x = 1,422.25 × 400.35
  4. Step 4: Simplify right side
    948.46x = 569,397.79
  5. Step 5: Solve for x
    x = 569,397.79/948.46
  6. Step 6: Final answer
    x = 600.34

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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.