Home / 1,586.67-2,191.69-1,218.20

Finding the Fourth Proportional to 1,586.67, 2,191.69 and 1,218.20

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Solution

The fourth proportional to 1,586.67, 2,191.69 and 1,218.20 is: 1,682.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,586.67 : 2,191.69 = 1,218.20 : x
  2. Step 2: Convert to fraction form
    1,586.67/2,191.69 = 1,218.20/x
  3. Step 3: Cross multiply
    1,586.67x = 2,191.69 × 1,218.20
  4. Step 4: Simplify right side
    1,586.67x = 2,669,916.76
  5. Step 5: Solve for x
    x = 2,669,916.76/1,586.67
  6. Step 6: Final answer
    x = 1,682.72

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Double scale
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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.