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Finding the Fourth Proportional to 803.99, 1,109.08 and 542.09

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Solution

The fourth proportional to 803.99, 1,109.08 and 542.09 is: 747.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    803.99 : 1,109.08 = 542.09 : x
  2. Step 2: Convert to fraction form
    803.99/1,109.08 = 542.09/x
  3. Step 3: Cross multiply
    803.99x = 1,109.08 × 542.09
  4. Step 4: Simplify right side
    803.99x = 601,221.18
  5. Step 5: Solve for x
    x = 601,221.18/803.99
  6. Step 6: Final answer
    x = 747.80

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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.