Home / 1,422.20-2,133.30-497.45

Finding the Fourth Proportional to 1,422.20, 2,133.30 and 497.45

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Solution

The fourth proportional to 1,422.20, 2,133.30 and 497.45 is: 746.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,422.20 : 2,133.30 = 497.45 : x
  2. Step 2: Convert to fraction form
    1,422.20/2,133.30 = 497.45/x
  3. Step 3: Cross multiply
    1,422.20x = 2,133.30 × 497.45
  4. Step 4: Simplify right side
    1,422.20x = 1,061,210.09
  5. Step 5: Solve for x
    x = 1,061,210.09/1,422.20
  6. Step 6: Final answer
    x = 746.18

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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.