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Finding the Fourth Proportional to 1,364.47, 2,046.95 and 439.94

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Solution

The fourth proportional to 1,364.47, 2,046.95 and 439.94 is: 659.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,364.47 : 2,046.95 = 439.94 : x
  2. Step 2: Convert to fraction form
    1,364.47/2,046.95 = 439.94/x
  3. Step 3: Cross multiply
    1,364.47x = 2,046.95 × 439.94
  4. Step 4: Simplify right side
    1,364.47x = 900,535.18
  5. Step 5: Solve for x
    x = 900,535.18/1,364.47
  6. Step 6: Final answer
    x = 659.99

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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.