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Finding the Fourth Proportional to 2,802.57, 3,867.79 and 1,543.87

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Solution

The fourth proportional to 2,802.57, 3,867.79 and 1,543.87 is: 2,130.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,802.57 : 3,867.79 = 1,543.87 : x
  2. Step 2: Convert to fraction form
    2,802.57/3,867.79 = 1,543.87/x
  3. Step 3: Cross multiply
    2,802.57x = 3,867.79 × 1,543.87
  4. Step 4: Simplify right side
    2,802.57x = 5,971,364.95
  5. Step 5: Solve for x
    x = 5,971,364.95/2,802.57
  6. Step 6: Final answer
    x = 2,130.67

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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.