Home / 1,931.30-2,663.78-1,223.26

Finding the Fourth Proportional to 1,931.30, 2,663.78 and 1,223.26

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Solution

The fourth proportional to 1,931.30, 2,663.78 and 1,223.26 is: 1,687.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,931.30 : 2,663.78 = 1,223.26 : x
  2. Step 2: Convert to fraction form
    1,931.30/2,663.78 = 1,223.26/x
  3. Step 3: Cross multiply
    1,931.30x = 2,663.78 × 1,223.26
  4. Step 4: Simplify right side
    1,931.30x = 3,258,482.75
  5. Step 5: Solve for x
    x = 3,258,482.75/1,931.30
  6. Step 6: Final answer
    x = 1,687.20

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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.