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Finding the Fourth Proportional to 1,307.56, 1,959.94 and 981.92

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Solution

The fourth proportional to 1,307.56, 1,959.94 and 981.92 is: 1,471.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,307.56 : 1,959.94 = 981.92 : x
  2. Step 2: Convert to fraction form
    1,307.56/1,959.94 = 981.92/x
  3. Step 3: Cross multiply
    1,307.56x = 1,959.94 × 981.92
  4. Step 4: Simplify right side
    1,307.56x = 1,924,504.28
  5. Step 5: Solve for x
    x = 1,924,504.28/1,307.56
  6. Step 6: Final answer
    x = 1,471.83

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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.