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Finding the Fourth Proportional to 1,868.57, 2,802.78 and 570

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Solution

The fourth proportional to 1,868.57, 2,802.78 and 570 is: 854.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,868.57 : 2,802.78 = 570 : x
  2. Step 2: Convert to fraction form
    1,868.57/2,802.78 = 570/x
  3. Step 3: Cross multiply
    1,868.57x = 2,802.78 × 570
  4. Step 4: Simplify right side
    1,868.57x = 1,597,584.60
  5. Step 5: Solve for x
    x = 1,597,584.60/1,868.57
  6. Step 6: Final answer
    x = 854.98

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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.