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Finding the Fourth Proportional to 1,291.71, 1,937.84 and 367.55

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Solution

The fourth proportional to 1,291.71, 1,937.84 and 367.55 is: 551.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,291.71 : 1,937.84 = 367.55 : x
  2. Step 2: Convert to fraction form
    1,291.71/1,937.84 = 367.55/x
  3. Step 3: Cross multiply
    1,291.71x = 1,937.84 × 367.55
  4. Step 4: Simplify right side
    1,291.71x = 712,253.09
  5. Step 5: Solve for x
    x = 712,253.09/1,291.71
  6. Step 6: Final answer
    x = 551.40

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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.