Home / 1,429.60-2,135.52-1,422.88

Finding the Fourth Proportional to 1,429.60, 2,135.52 and 1,422.88

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Solution

The fourth proportional to 1,429.60, 2,135.52 and 1,422.88 is: 2,125.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,429.60 : 2,135.52 = 1,422.88 : x
  2. Step 2: Convert to fraction form
    1,429.60/2,135.52 = 1,422.88/x
  3. Step 3: Cross multiply
    1,429.60x = 2,135.52 × 1,422.88
  4. Step 4: Simplify right side
    1,429.60x = 3,038,588.70
  5. Step 5: Solve for x
    x = 3,038,588.70/1,429.60
  6. Step 6: Final answer
    x = 2,125.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.