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Finding the Fourth Proportional to 792.40, 1,094.10 and 512.80

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Solution

The fourth proportional to 792.40, 1,094.10 and 512.80 is: 708.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    792.40 : 1,094.10 = 512.80 : x
  2. Step 2: Convert to fraction form
    792.40/1,094.10 = 512.80/x
  3. Step 3: Cross multiply
    792.40x = 1,094.10 × 512.80
  4. Step 4: Simplify right side
    792.40x = 561,054.48
  5. Step 5: Solve for x
    x = 561,054.48/792.40
  6. Step 6: Final answer
    x = 708.04

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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.