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Finding the Fourth Proportional to 837.56, 1,155.28 and 505.64

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Solution

The fourth proportional to 837.56, 1,155.28 and 505.64 is: 697.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    837.56 : 1,155.28 = 505.64 : x
  2. Step 2: Convert to fraction form
    837.56/1,155.28 = 505.64/x
  3. Step 3: Cross multiply
    837.56x = 1,155.28 × 505.64
  4. Step 4: Simplify right side
    837.56x = 584,155.78
  5. Step 5: Solve for x
    x = 584,155.78/837.56
  6. Step 6: Final answer
    x = 697.45

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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.