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Finding the Fourth Proportional to 1,805.37, 2,708.40 and 572.45

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Solution

The fourth proportional to 1,805.37, 2,708.40 and 572.45 is: 858.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,805.37 : 2,708.40 = 572.45 : x
  2. Step 2: Convert to fraction form
    1,805.37/2,708.40 = 572.45/x
  3. Step 3: Cross multiply
    1,805.37x = 2,708.40 × 572.45
  4. Step 4: Simplify right side
    1,805.37x = 1,550,420.72
  5. Step 5: Solve for x
    x = 1,550,420.72/1,805.37
  6. Step 6: Final answer
    x = 858.78

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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.