Home / 1,585.52-2,186.78-1,211.57

Finding the Fourth Proportional to 1,585.52, 2,186.78 and 1,211.57

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Solution

The fourth proportional to 1,585.52, 2,186.78 and 1,211.57 is: 1,671.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,585.52 : 2,186.78 = 1,211.57 : x
  2. Step 2: Convert to fraction form
    1,585.52/2,186.78 = 1,211.57/x
  3. Step 3: Cross multiply
    1,585.52x = 2,186.78 × 1,211.57
  4. Step 4: Simplify right side
    1,585.52x = 2,649,429.14
  5. Step 5: Solve for x
    x = 2,649,429.14/1,585.52
  6. Step 6: Final answer
    x = 1,671.02

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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.