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Finding the Fourth Proportional to 1,322.64, 1,980.88 and 801.47

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Solution

The fourth proportional to 1,322.64, 1,980.88 and 801.47 is: 1,200.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,322.64 : 1,980.88 = 801.47 : x
  2. Step 2: Convert to fraction form
    1,322.64/1,980.88 = 801.47/x
  3. Step 3: Cross multiply
    1,322.64x = 1,980.88 × 801.47
  4. Step 4: Simplify right side
    1,322.64x = 1,587,618.84
  5. Step 5: Solve for x
    x = 1,587,618.84/1,322.64
  6. Step 6: Final answer
    x = 1,200.34

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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.