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Finding the Fourth Proportional to 625,807.22, 863,630.95 and 353,915.78

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Solution

The fourth proportional to 625,807.22, 863,630.95 and 353,915.78 is: 488,413.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,807.22 : 863,630.95 = 353,915.78 : x
  2. Step 2: Convert to fraction form
    625,807.22/863,630.95 = 353,915.78/x
  3. Step 3: Cross multiply
    625,807.22x = 863,630.95 × 353,915.78
  4. Step 4: Simplify right side
    625,807.22x = 305,652,617,372.74
  5. Step 5: Solve for x
    x = 305,652,617,372.74/625,807.22
  6. Step 6: Final answer
    x = 488,413.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.