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Finding the Fourth Proportional to 423,079.80, 634,965.30 and 409,255.80

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Solution

The fourth proportional to 423,079.80, 634,965.30 and 409,255.80 is: 614,218.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,079.80 : 634,965.30 = 409,255.80 : x
  2. Step 2: Convert to fraction form
    423,079.80/634,965.30 = 409,255.80/x
  3. Step 3: Cross multiply
    423,079.80x = 634,965.30 × 409,255.80
  4. Step 4: Simplify right side
    423,079.80x = 259,863,231,823.74
  5. Step 5: Solve for x
    x = 259,863,231,823.74/423,079.80
  6. Step 6: Final answer
    x = 614,218.01

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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.