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Finding the Fourth Proportional to 948.48, 1,422.80 and 264.48

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Solution

The fourth proportional to 948.48, 1,422.80 and 264.48 is: 396.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.48 : 1,422.80 = 264.48 : x
  2. Step 2: Convert to fraction form
    948.48/1,422.80 = 264.48/x
  3. Step 3: Cross multiply
    948.48x = 1,422.80 × 264.48
  4. Step 4: Simplify right side
    948.48x = 376,302.14
  5. Step 5: Solve for x
    x = 376,302.14/948.48
  6. Step 6: Final answer
    x = 396.74

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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.