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Finding the Fourth Proportional to 1,296.60, 1,941.84 and 988.08

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Solution

The fourth proportional to 1,296.60, 1,941.84 and 988.08 is: 1,479.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,296.60 : 1,941.84 = 988.08 : x
  2. Step 2: Convert to fraction form
    1,296.60/1,941.84 = 988.08/x
  3. Step 3: Cross multiply
    1,296.60x = 1,941.84 × 988.08
  4. Step 4: Simplify right side
    1,296.60x = 1,918,693.27
  5. Step 5: Solve for x
    x = 1,918,693.27/1,296.60
  6. Step 6: Final answer
    x = 1,479.79

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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.