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Finding the Fourth Proportional to 1,664.32, 2,494.40 and 883.20

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Solution

The fourth proportional to 1,664.32, 2,494.40 and 883.20 is: 1,323.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,664.32 : 2,494.40 = 883.20 : x
  2. Step 2: Convert to fraction form
    1,664.32/2,494.40 = 883.20/x
  3. Step 3: Cross multiply
    1,664.32x = 2,494.40 × 883.20
  4. Step 4: Simplify right side
    1,664.32x = 2,203,054.08
  5. Step 5: Solve for x
    x = 2,203,054.08/1,664.32
  6. Step 6: Final answer
    x = 1,323.70

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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.