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Finding the Fourth Proportional to 1,870.16, 2,805.28 and 773.84

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Solution

The fourth proportional to 1,870.16, 2,805.28 and 773.84 is: 1,160.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,870.16 : 2,805.28 = 773.84 : x
  2. Step 2: Convert to fraction form
    1,870.16/2,805.28 = 773.84/x
  3. Step 3: Cross multiply
    1,870.16x = 2,805.28 × 773.84
  4. Step 4: Simplify right side
    1,870.16x = 2,170,837.88
  5. Step 5: Solve for x
    x = 2,170,837.88/1,870.16
  6. Step 6: Final answer
    x = 1,160.78

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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.