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Finding the Fourth Proportional to 1,036.37, 1,554.60 and 411.79

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Solution

The fourth proportional to 1,036.37, 1,554.60 and 411.79 is: 617.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,036.37 : 1,554.60 = 411.79 : x
  2. Step 2: Convert to fraction form
    1,036.37/1,554.60 = 411.79/x
  3. Step 3: Cross multiply
    1,036.37x = 1,554.60 × 411.79
  4. Step 4: Simplify right side
    1,036.37x = 640,164.85
  5. Step 5: Solve for x
    x = 640,164.85/1,036.37
  6. Step 6: Final answer
    x = 617.70

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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.