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Finding the Fourth Proportional to 1,908.41, 2,862.65 and 521.89

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Solution

The fourth proportional to 1,908.41, 2,862.65 and 521.89 is: 782.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,908.41 : 2,862.65 = 521.89 : x
  2. Step 2: Convert to fraction form
    1,908.41/2,862.65 = 521.89/x
  3. Step 3: Cross multiply
    1,908.41x = 2,862.65 × 521.89
  4. Step 4: Simplify right side
    1,908.41x = 1,493,988.41
  5. Step 5: Solve for x
    x = 1,493,988.41/1,908.41
  6. Step 6: Final answer
    x = 782.84

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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.