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Finding the Fourth Proportional to 1,924.78, 2,888.25 and 770.62

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Solution

The fourth proportional to 1,924.78, 2,888.25 and 770.62 is: 1,156.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,924.78 : 2,888.25 = 770.62 : x
  2. Step 2: Convert to fraction form
    1,924.78/2,888.25 = 770.62/x
  3. Step 3: Cross multiply
    1,924.78x = 2,888.25 × 770.62
  4. Step 4: Simplify right side
    1,924.78x = 2,225,743.22
  5. Step 5: Solve for x
    x = 2,225,743.22/1,924.78
  6. Step 6: Final answer
    x = 1,156.36

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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.