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Finding the Fourth Proportional to 837.20, 1,155.36 and 464.15

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Solution

The fourth proportional to 837.20, 1,155.36 and 464.15 is: 640.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    837.20 : 1,155.36 = 464.15 : x
  2. Step 2: Convert to fraction form
    837.20/1,155.36 = 464.15/x
  3. Step 3: Cross multiply
    837.20x = 1,155.36 × 464.15
  4. Step 4: Simplify right side
    837.20x = 536,260.34
  5. Step 5: Solve for x
    x = 536,260.34/837.20
  6. Step 6: Final answer
    x = 640.54

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1.5x scale

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.