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Finding the Fourth Proportional to 426,200.80, 639,646.80 and 412,376.80

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Solution

The fourth proportional to 426,200.80, 639,646.80 and 412,376.80 is: 618,899.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,200.80 : 639,646.80 = 412,376.80 : x
  2. Step 2: Convert to fraction form
    426,200.80/639,646.80 = 412,376.80/x
  3. Step 3: Cross multiply
    426,200.80x = 639,646.80 × 412,376.80
  4. Step 4: Simplify right side
    426,200.80x = 263,775,500,514.24
  5. Step 5: Solve for x
    x = 263,775,500,514.24/426,200.80
  6. Step 6: Final answer
    x = 618,899.59

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1.5x scale

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.