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Finding the Fourth Proportional to 903.72, 1,354.20 and 537.80

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Solution

The fourth proportional to 903.72, 1,354.20 and 537.80 is: 805.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.72 : 1,354.20 = 537.80 : x
  2. Step 2: Convert to fraction form
    903.72/1,354.20 = 537.80/x
  3. Step 3: Cross multiply
    903.72x = 1,354.20 × 537.80
  4. Step 4: Simplify right side
    903.72x = 728,288.76
  5. Step 5: Solve for x
    x = 728,288.76/903.72
  6. Step 6: Final answer
    x = 805.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.