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Finding the Fourth Proportional to 2,911.71, 4,018.17 and 1,585.42

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Solution

The fourth proportional to 2,911.71, 4,018.17 and 1,585.42 is: 2,187.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,911.71 : 4,018.17 = 1,585.42 : x
  2. Step 2: Convert to fraction form
    2,911.71/4,018.17 = 1,585.42/x
  3. Step 3: Cross multiply
    2,911.71x = 4,018.17 × 1,585.42
  4. Step 4: Simplify right side
    2,911.71x = 6,370,466.99
  5. Step 5: Solve for x
    x = 6,370,466.99/2,911.71
  6. Step 6: Final answer
    x = 2,187.88

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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.