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Finding the Fourth Proportional to 603,717.20, 905,575.80 and 426,570.20

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Solution

The fourth proportional to 603,717.20, 905,575.80 and 426,570.20 is: 639,855.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,717.20 : 905,575.80 = 426,570.20 : x
  2. Step 2: Convert to fraction form
    603,717.20/905,575.80 = 426,570.20/x
  3. Step 3: Cross multiply
    603,717.20x = 905,575.80 × 426,570.20
  4. Step 4: Simplify right side
    603,717.20x = 386,291,650,121.16
  5. Step 5: Solve for x
    x = 386,291,650,121.16/603,717.20
  6. Step 6: Final answer
    x = 639,855.30

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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.