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Finding the Fourth Proportional to 1,291.70, 1,937.59 and 367.16

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Solution

The fourth proportional to 1,291.70, 1,937.59 and 367.16 is: 550.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,291.70 : 1,937.59 = 367.16 : x
  2. Step 2: Convert to fraction form
    1,291.70/1,937.59 = 367.16/x
  3. Step 3: Cross multiply
    1,291.70x = 1,937.59 × 367.16
  4. Step 4: Simplify right side
    1,291.70x = 711,394.94
  5. Step 5: Solve for x
    x = 711,394.94/1,291.70
  6. Step 6: Final answer
    x = 550.74

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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.