Home / 1,489.12-2,055.11-826.11

Finding the Fourth Proportional to 1,489.12, 2,055.11 and 826.11

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Solution

The fourth proportional to 1,489.12, 2,055.11 and 826.11 is: 1,140.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,489.12 : 2,055.11 = 826.11 : x
  2. Step 2: Convert to fraction form
    1,489.12/2,055.11 = 826.11/x
  3. Step 3: Cross multiply
    1,489.12x = 2,055.11 × 826.11
  4. Step 4: Simplify right side
    1,489.12x = 1,697,746.92
  5. Step 5: Solve for x
    x = 1,697,746.92/1,489.12
  6. Step 6: Final answer
    x = 1,140.10

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1.5x scale

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.