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Finding the Fourth Proportional to 1,036.80, 1,555.20 and 306.54

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Solution

The fourth proportional to 1,036.80, 1,555.20 and 306.54 is: 459.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,036.80 : 1,555.20 = 306.54 : x
  2. Step 2: Convert to fraction form
    1,036.80/1,555.20 = 306.54/x
  3. Step 3: Cross multiply
    1,036.80x = 1,555.20 × 306.54
  4. Step 4: Simplify right side
    1,036.80x = 476,731.01
  5. Step 5: Solve for x
    x = 476,731.01/1,036.80
  6. Step 6: Final answer
    x = 459.81

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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.