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Finding the Fourth Proportional to 1,422.40, 1,962.91 and 792.93

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Solution

The fourth proportional to 1,422.40, 1,962.91 and 792.93 is: 1,094.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,422.40 : 1,962.91 = 792.93 : x
  2. Step 2: Convert to fraction form
    1,422.40/1,962.91 = 792.93/x
  3. Step 3: Cross multiply
    1,422.40x = 1,962.91 × 792.93
  4. Step 4: Simplify right side
    1,422.40x = 1,556,450.23
  5. Step 5: Solve for x
    x = 1,556,450.23/1,422.40
  6. Step 6: Final answer
    x = 1,094.24

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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.