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Finding the Fourth Proportional to 410,315.80, 615,128.10 and 213,323.80

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Solution

The fourth proportional to 410,315.80, 615,128.10 and 213,323.80 is: 319,806.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    410,315.80 : 615,128.10 = 213,323.80 : x
  2. Step 2: Convert to fraction form
    410,315.80/615,128.10 = 213,323.80/x
  3. Step 3: Cross multiply
    410,315.80x = 615,128.10 × 213,323.80
  4. Step 4: Simplify right side
    410,315.80x = 131,221,463,778.78
  5. Step 5: Solve for x
    x = 131,221,463,778.78/410,315.80
  6. Step 6: Final answer
    x = 319,806.02

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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.