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Finding the Fourth Proportional to 1,422.36, 1,962.75 and 792.84

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Solution

The fourth proportional to 1,422.36, 1,962.75 and 792.84 is: 1,094.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,422.36 : 1,962.75 = 792.84 : x
  2. Step 2: Convert to fraction form
    1,422.36/1,962.75 = 792.84/x
  3. Step 3: Cross multiply
    1,422.36x = 1,962.75 × 792.84
  4. Step 4: Simplify right side
    1,422.36x = 1,556,146.71
  5. Step 5: Solve for x
    x = 1,556,146.71/1,422.36
  6. Step 6: Final answer
    x = 1,094.06

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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.