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Finding the Fourth Proportional to 603,683.61, 905,552.89 and 426,979.41

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Solution

The fourth proportional to 603,683.61, 905,552.89 and 426,979.41 is: 640,488.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,683.61 : 905,552.89 = 426,979.41 : x
  2. Step 2: Convert to fraction form
    603,683.61/905,552.89 = 426,979.41/x
  3. Step 3: Cross multiply
    603,683.61x = 905,552.89 × 426,979.41
  4. Step 4: Simplify right side
    603,683.61x = 386,652,437,628.55
  5. Step 5: Solve for x
    x = 386,652,437,628.55/603,683.61
  6. Step 6: Final answer
    x = 640,488.55

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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.