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Finding the Fourth Proportional to 321,237.15, 443,306.84 and 178,006.47

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Solution

The fourth proportional to 321,237.15, 443,306.84 and 178,006.47 is: 245,648.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,237.15 : 443,306.84 = 178,006.47 : x
  2. Step 2: Convert to fraction form
    321,237.15/443,306.84 = 178,006.47/x
  3. Step 3: Cross multiply
    321,237.15x = 443,306.84 × 178,006.47
  4. Step 4: Simplify right side
    321,237.15x = 78,911,484,825.22
  5. Step 5: Solve for x
    x = 78,911,484,825.22/321,237.15
  6. Step 6: Final answer
    x = 245,648.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.