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Finding the Fourth Proportional to 647,136.90, 970,244.55 and 247,623.30

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Solution

The fourth proportional to 647,136.90, 970,244.55 and 247,623.30 is: 371,258.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,136.90 : 970,244.55 = 247,623.30 : x
  2. Step 2: Convert to fraction form
    647,136.90/970,244.55 = 247,623.30/x
  3. Step 3: Cross multiply
    647,136.90x = 970,244.55 × 247,623.30
  4. Step 4: Simplify right side
    647,136.90x = 240,255,157,278.02
  5. Step 5: Solve for x
    x = 240,255,157,278.02/647,136.90
  6. Step 6: Final answer
    x = 371,258.63

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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.