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Finding the Fourth Proportional to 535.90, 738.55 and 404.70

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Solution

The fourth proportional to 535.90, 738.55 and 404.70 is: 557.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    535.90 : 738.55 = 404.70 : x
  2. Step 2: Convert to fraction form
    535.90/738.55 = 404.70/x
  3. Step 3: Cross multiply
    535.90x = 738.55 × 404.70
  4. Step 4: Simplify right side
    535.90x = 298,891.19
  5. Step 5: Solve for x
    x = 298,891.19/535.90
  6. Step 6: Final answer
    x = 557.74

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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.