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Finding the Fourth Proportional to 1,868.15, 2,801.99 and 772.37

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Solution

The fourth proportional to 1,868.15, 2,801.99 and 772.37 is: 1,158.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,868.15 : 2,801.99 = 772.37 : x
  2. Step 2: Convert to fraction form
    1,868.15/2,801.99 = 772.37/x
  3. Step 3: Cross multiply
    1,868.15x = 2,801.99 × 772.37
  4. Step 4: Simplify right side
    1,868.15x = 2,164,155.14
  5. Step 5: Solve for x
    x = 2,164,155.14/1,868.15
  6. Step 6: Final answer
    x = 1,158.45

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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.