Home / 1,531.20-2,291.34-1,428.23

Finding the Fourth Proportional to 1,531.20, 2,291.34 and 1,428.23

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Solution

The fourth proportional to 1,531.20, 2,291.34 and 1,428.23 is: 2,137.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,531.20 : 2,291.34 = 1,428.23 : x
  2. Step 2: Convert to fraction form
    1,531.20/2,291.34 = 1,428.23/x
  3. Step 3: Cross multiply
    1,531.20x = 2,291.34 × 1,428.23
  4. Step 4: Simplify right side
    1,531.20x = 3,272,563.58
  5. Step 5: Solve for x
    x = 3,272,563.58/1,531.20
  6. Step 6: Final answer
    x = 2,137.25

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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.