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Finding the Fourth Proportional to 837.30, 1,155 and 505.56

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Solution

The fourth proportional to 837.30, 1,155 and 505.56 is: 697.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    837.30 : 1,155 = 505.56 : x
  2. Step 2: Convert to fraction form
    837.30/1,155 = 505.56/x
  3. Step 3: Cross multiply
    837.30x = 1,155 × 505.56
  4. Step 4: Simplify right side
    837.30x = 583,921.80
  5. Step 5: Solve for x
    x = 583,921.80/837.30
  6. Step 6: Final answer
    x = 697.39

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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.