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Finding the Fourth Proportional to 1,364.92, 2,047.36 and 391.01

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Solution

The fourth proportional to 1,364.92, 2,047.36 and 391.01 is: 586.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,364.92 : 2,047.36 = 391.01 : x
  2. Step 2: Convert to fraction form
    1,364.92/2,047.36 = 391.01/x
  3. Step 3: Cross multiply
    1,364.92x = 2,047.36 × 391.01
  4. Step 4: Simplify right side
    1,364.92x = 800,539.27
  5. Step 5: Solve for x
    x = 800,539.27/1,364.92
  6. Step 6: Final answer
    x = 586.51

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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.