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Finding the Fourth Proportional to 1,356.96, 1,872 and 964.32

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Solution

The fourth proportional to 1,356.96, 1,872 and 964.32 is: 1,330.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,356.96 : 1,872 = 964.32 : x
  2. Step 2: Convert to fraction form
    1,356.96/1,872 = 964.32/x
  3. Step 3: Cross multiply
    1,356.96x = 1,872 × 964.32
  4. Step 4: Simplify right side
    1,356.96x = 1,805,207.04
  5. Step 5: Solve for x
    x = 1,805,207.04/1,356.96
  6. Step 6: Final answer
    x = 1,330.33

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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.