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Finding the Fourth Proportional to 1,101.80, 1,651.82 and 554.20

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Solution

The fourth proportional to 1,101.80, 1,651.82 and 554.20 is: 830.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,101.80 : 1,651.82 = 554.20 : x
  2. Step 2: Convert to fraction form
    1,101.80/1,651.82 = 554.20/x
  3. Step 3: Cross multiply
    1,101.80x = 1,651.82 × 554.20
  4. Step 4: Simplify right side
    1,101.80x = 915,438.64
  5. Step 5: Solve for x
    x = 915,438.64/1,101.80
  6. Step 6: Final answer
    x = 830.86

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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.