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Finding the Fourth Proportional to 437,968.80, 656,953.20 and 142,480.80

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Solution

The fourth proportional to 437,968.80, 656,953.20 and 142,480.80 is: 213,721.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,968.80 : 656,953.20 = 142,480.80 : x
  2. Step 2: Convert to fraction form
    437,968.80/656,953.20 = 142,480.80/x
  3. Step 3: Cross multiply
    437,968.80x = 656,953.20 × 142,480.80
  4. Step 4: Simplify right side
    437,968.80x = 93,603,217,498.56
  5. Step 5: Solve for x
    x = 93,603,217,498.56/437,968.80
  6. Step 6: Final answer
    x = 213,721.20

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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.