Home / 1,875.32-2,589-1,286.72

Finding the Fourth Proportional to 1,875.32, 2,589 and 1,286.72

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Solution

The fourth proportional to 1,875.32, 2,589 and 1,286.72 is: 1,776.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,875.32 : 2,589 = 1,286.72 : x
  2. Step 2: Convert to fraction form
    1,875.32/2,589 = 1,286.72/x
  3. Step 3: Cross multiply
    1,875.32x = 2,589 × 1,286.72
  4. Step 4: Simplify right side
    1,875.32x = 3,331,318.08
  5. Step 5: Solve for x
    x = 3,331,318.08/1,875.32
  6. Step 6: Final answer
    x = 1,776.40

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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.