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Finding the Fourth Proportional to 1,809.18, 2,710.68 and 988.03

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Solution

The fourth proportional to 1,809.18, 2,710.68 and 988.03 is: 1,480.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,809.18 : 2,710.68 = 988.03 : x
  2. Step 2: Convert to fraction form
    1,809.18/2,710.68 = 988.03/x
  3. Step 3: Cross multiply
    1,809.18x = 2,710.68 × 988.03
  4. Step 4: Simplify right side
    1,809.18x = 2,678,232.84
  5. Step 5: Solve for x
    x = 2,678,232.84/1,809.18
  6. Step 6: Final answer
    x = 1,480.36

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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.