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Finding the Fourth Proportional to 535.40, 737.86 and 404.20

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Solution

The fourth proportional to 535.40, 737.86 and 404.20 is: 557.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    535.40 : 737.86 = 404.20 : x
  2. Step 2: Convert to fraction form
    535.40/737.86 = 404.20/x
  3. Step 3: Cross multiply
    535.40x = 737.86 × 404.20
  4. Step 4: Simplify right side
    535.40x = 298,243.01
  5. Step 5: Solve for x
    x = 298,243.01/535.40
  6. Step 6: Final answer
    x = 557.05

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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.