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Finding the Fourth Proportional to 1,921.34, 2,887.48 and 948.12

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Solution

The fourth proportional to 1,921.34, 2,887.48 and 948.12 is: 1,424.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.34 : 2,887.48 = 948.12 : x
  2. Step 2: Convert to fraction form
    1,921.34/2,887.48 = 948.12/x
  3. Step 3: Cross multiply
    1,921.34x = 2,887.48 × 948.12
  4. Step 4: Simplify right side
    1,921.34x = 2,737,677.54
  5. Step 5: Solve for x
    x = 2,737,677.54/1,921.34
  6. Step 6: Final answer
    x = 1,424.88

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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.