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Finding the Fourth Proportional to 1,665.85, 2,498.78 and 570.22

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Solution

The fourth proportional to 1,665.85, 2,498.78 and 570.22 is: 855.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,665.85 : 2,498.78 = 570.22 : x
  2. Step 2: Convert to fraction form
    1,665.85/2,498.78 = 570.22/x
  3. Step 3: Cross multiply
    1,665.85x = 2,498.78 × 570.22
  4. Step 4: Simplify right side
    1,665.85x = 1,424,854.33
  5. Step 5: Solve for x
    x = 1,424,854.33/1,665.85
  6. Step 6: Final answer
    x = 855.33

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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.