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Finding the Fourth Proportional to 604,697.80, 907,338.30 and 426,821.80

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Solution

The fourth proportional to 604,697.80, 907,338.30 and 426,821.80 is: 640,438.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    604,697.80 : 907,338.30 = 426,821.80 : x
  2. Step 2: Convert to fraction form
    604,697.80/907,338.30 = 426,821.80/x
  3. Step 3: Cross multiply
    604,697.80x = 907,338.30 × 426,821.80
  4. Step 4: Simplify right side
    604,697.80x = 387,271,766,414.94
  5. Step 5: Solve for x
    x = 387,271,766,414.94/604,697.80
  6. Step 6: Final answer
    x = 640,438.52

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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.