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Finding the Fourth Proportional to 1,339.74, 2,011.64 and 792.18

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Solution

The fourth proportional to 1,339.74, 2,011.64 and 792.18 is: 1,189.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,339.74 : 2,011.64 = 792.18 : x
  2. Step 2: Convert to fraction form
    1,339.74/2,011.64 = 792.18/x
  3. Step 3: Cross multiply
    1,339.74x = 2,011.64 × 792.18
  4. Step 4: Simplify right side
    1,339.74x = 1,593,577.01
  5. Step 5: Solve for x
    x = 1,593,577.01/1,339.74
  6. Step 6: Final answer
    x = 1,189.47

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1.5x scale

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.