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Finding the Fourth Proportional to 355,012.80, 532,519.20 and 215,044.80

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Solution

The fourth proportional to 355,012.80, 532,519.20 and 215,044.80 is: 322,567.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,012.80 : 532,519.20 = 215,044.80 : x
  2. Step 2: Convert to fraction form
    355,012.80/532,519.20 = 215,044.80/x
  3. Step 3: Cross multiply
    355,012.80x = 532,519.20 × 215,044.80
  4. Step 4: Simplify right side
    355,012.80x = 114,515,484,860.16
  5. Step 5: Solve for x
    x = 114,515,484,860.16/355,012.80
  6. Step 6: Final answer
    x = 322,567.20

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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.