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Finding the Fourth Proportional to 799.07, 1,101.60 and 621.47

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Solution

The fourth proportional to 799.07, 1,101.60 and 621.47 is: 856.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    799.07 : 1,101.60 = 621.47 : x
  2. Step 2: Convert to fraction form
    799.07/1,101.60 = 621.47/x
  3. Step 3: Cross multiply
    799.07x = 1,101.60 × 621.47
  4. Step 4: Simplify right side
    799.07x = 684,614.11
  5. Step 5: Solve for x
    x = 684,614.11/799.07
  6. Step 6: Final answer
    x = 856.77

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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.