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Finding the Fourth Proportional to 2,155.16, 3,232.32 and 694.32

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Solution

The fourth proportional to 2,155.16, 3,232.32 and 694.32 is: 1,041.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,155.16 : 3,232.32 = 694.32 : x
  2. Step 2: Convert to fraction form
    2,155.16/3,232.32 = 694.32/x
  3. Step 3: Cross multiply
    2,155.16x = 3,232.32 × 694.32
  4. Step 4: Simplify right side
    2,155.16x = 2,244,264.42
  5. Step 5: Solve for x
    x = 2,244,264.42/2,155.16
  6. Step 6: Final answer
    x = 1,041.35

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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.