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Finding the Fourth Proportional to 798.92, 1,102.56 and 484.40

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Solution

The fourth proportional to 798.92, 1,102.56 and 484.40 is: 668.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    798.92 : 1,102.56 = 484.40 : x
  2. Step 2: Convert to fraction form
    798.92/1,102.56 = 484.40/x
  3. Step 3: Cross multiply
    798.92x = 1,102.56 × 484.40
  4. Step 4: Simplify right side
    798.92x = 534,080.06
  5. Step 5: Solve for x
    x = 534,080.06/798.92
  6. Step 6: Final answer
    x = 668.50

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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.