Home / 1,233.40-1,699.98-938.20

Finding the Fourth Proportional to 1,233.40, 1,699.98 and 938.20

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Solution

The fourth proportional to 1,233.40, 1,699.98 and 938.20 is: 1,293.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,233.40 : 1,699.98 = 938.20 : x
  2. Step 2: Convert to fraction form
    1,233.40/1,699.98 = 938.20/x
  3. Step 3: Cross multiply
    1,233.40x = 1,699.98 × 938.20
  4. Step 4: Simplify right side
    1,233.40x = 1,594,921.24
  5. Step 5: Solve for x
    x = 1,594,921.24/1,233.40
  6. Step 6: Final answer
    x = 1,293.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.