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Finding the Fourth Proportional to 803.84, 1,109.30 and 472.27

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Solution

The fourth proportional to 803.84, 1,109.30 and 472.27 is: 651.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    803.84 : 1,109.30 = 472.27 : x
  2. Step 2: Convert to fraction form
    803.84/1,109.30 = 472.27/x
  3. Step 3: Cross multiply
    803.84x = 1,109.30 × 472.27
  4. Step 4: Simplify right side
    803.84x = 523,887.52
  5. Step 5: Solve for x
    x = 523,887.52/803.84
  6. Step 6: Final answer
    x = 651.74

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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.