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Finding the Fourth Proportional to 1,811.24, 2,717.20 and 578.32

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Solution

The fourth proportional to 1,811.24, 2,717.20 and 578.32 is: 867.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,811.24 : 2,717.20 = 578.32 : x
  2. Step 2: Convert to fraction form
    1,811.24/2,717.20 = 578.32/x
  3. Step 3: Cross multiply
    1,811.24x = 2,717.20 × 578.32
  4. Step 4: Simplify right side
    1,811.24x = 1,571,411.10
  5. Step 5: Solve for x
    x = 1,571,411.10/1,811.24
  6. Step 6: Final answer
    x = 867.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.