Home / 1,328.29-1,989.35-1,282.15

Finding the Fourth Proportional to 1,328.29, 1,989.35 and 1,282.15

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Solution

The fourth proportional to 1,328.29, 1,989.35 and 1,282.15 is: 1,920.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328.29 : 1,989.35 = 1,282.15 : x
  2. Step 2: Convert to fraction form
    1,328.29/1,989.35 = 1,282.15/x
  3. Step 3: Cross multiply
    1,328.29x = 1,989.35 × 1,282.15
  4. Step 4: Simplify right side
    1,328.29x = 2,550,638.69
  5. Step 5: Solve for x
    x = 2,550,638.69/1,328.29
  6. Step 6: Final answer
    x = 1,920.24

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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.