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Finding the Fourth Proportional to 535.78, 739.28 and 302.90

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Solution

The fourth proportional to 535.78, 739.28 and 302.90 is: 417.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    535.78 : 739.28 = 302.90 : x
  2. Step 2: Convert to fraction form
    535.78/739.28 = 302.90/x
  3. Step 3: Cross multiply
    535.78x = 739.28 × 302.90
  4. Step 4: Simplify right side
    535.78x = 223,927.91
  5. Step 5: Solve for x
    x = 223,927.91/535.78
  6. Step 6: Final answer
    x = 417.95

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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.