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Finding the Fourth Proportional to 442,913.20, 664,369.80 and 418,418.80

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Solution

The fourth proportional to 442,913.20, 664,369.80 and 418,418.80 is: 627,628.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,913.20 : 664,369.80 = 418,418.80 : x
  2. Step 2: Convert to fraction form
    442,913.20/664,369.80 = 418,418.80/x
  3. Step 3: Cross multiply
    442,913.20x = 664,369.80 × 418,418.80
  4. Step 4: Simplify right side
    442,913.20x = 277,984,814,472.24
  5. Step 5: Solve for x
    x = 277,984,814,472.24/442,913.20
  6. Step 6: Final answer
    x = 627,628.20

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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.