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Finding the Fourth Proportional to 1,431.60, 1,973.88 and 965.04

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Solution

The fourth proportional to 1,431.60, 1,973.88 and 965.04 is: 1,330.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.60 : 1,973.88 = 965.04 : x
  2. Step 2: Convert to fraction form
    1,431.60/1,973.88 = 965.04/x
  3. Step 3: Cross multiply
    1,431.60x = 1,973.88 × 965.04
  4. Step 4: Simplify right side
    1,431.60x = 1,904,873.16
  5. Step 5: Solve for x
    x = 1,904,873.16/1,431.60
  6. Step 6: Final answer
    x = 1,330.59

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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.