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Finding the Fourth Proportional to 1,871.25, 2,806.77 and 572.71

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Solution

The fourth proportional to 1,871.25, 2,806.77 and 572.71 is: 859.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,871.25 : 2,806.77 = 572.71 : x
  2. Step 2: Convert to fraction form
    1,871.25/2,806.77 = 572.71/x
  3. Step 3: Cross multiply
    1,871.25x = 2,806.77 × 572.71
  4. Step 4: Simplify right side
    1,871.25x = 1,607,465.25
  5. Step 5: Solve for x
    x = 1,607,465.25/1,871.25
  6. Step 6: Final answer
    x = 859.03

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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.