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Finding the Fourth Proportional to 1,419.73, 2,131.65 and 903.02

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Solution

The fourth proportional to 1,419.73, 2,131.65 and 903.02 is: 1,355.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,419.73 : 2,131.65 = 903.02 : x
  2. Step 2: Convert to fraction form
    1,419.73/2,131.65 = 903.02/x
  3. Step 3: Cross multiply
    1,419.73x = 2,131.65 × 903.02
  4. Step 4: Simplify right side
    1,419.73x = 1,924,911.92
  5. Step 5: Solve for x
    x = 1,924,911.92/1,419.73
  6. Step 6: Final answer
    x = 1,355.83

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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.