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Finding the Fourth Proportional to 1,369.71, 1,889.87 and 927.45

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Solution

The fourth proportional to 1,369.71, 1,889.87 and 927.45 is: 1,279.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,369.71 : 1,889.87 = 927.45 : x
  2. Step 2: Convert to fraction form
    1,369.71/1,889.87 = 927.45/x
  3. Step 3: Cross multiply
    1,369.71x = 1,889.87 × 927.45
  4. Step 4: Simplify right side
    1,369.71x = 1,752,755.29
  5. Step 5: Solve for x
    x = 1,752,755.29/1,369.71
  6. Step 6: Final answer
    x = 1,279.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.