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Finding the Fourth Proportional to 1,333.65, 1,998.05 and 983.13

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Solution

The fourth proportional to 1,333.65, 1,998.05 and 983.13 is: 1,472.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,333.65 : 1,998.05 = 983.13 : x
  2. Step 2: Convert to fraction form
    1,333.65/1,998.05 = 983.13/x
  3. Step 3: Cross multiply
    1,333.65x = 1,998.05 × 983.13
  4. Step 4: Simplify right side
    1,333.65x = 1,964,342.90
  5. Step 5: Solve for x
    x = 1,964,342.90/1,333.65
  6. Step 6: Final answer
    x = 1,472.91

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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.