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Finding the Fourth Proportional to 2,213.88, 3,320.80 and 570.42

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Solution

The fourth proportional to 2,213.88, 3,320.80 and 570.42 is: 855.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,213.88 : 3,320.80 = 570.42 : x
  2. Step 2: Convert to fraction form
    2,213.88/3,320.80 = 570.42/x
  3. Step 3: Cross multiply
    2,213.88x = 3,320.80 × 570.42
  4. Step 4: Simplify right side
    2,213.88x = 1,894,264.59
  5. Step 5: Solve for x
    x = 1,894,264.59/2,213.88
  6. Step 6: Final answer
    x = 855.63

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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.