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Finding the Fourth Proportional to 547,728.80, 821,679.60 and 173,789.60

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Solution

The fourth proportional to 547,728.80, 821,679.60 and 173,789.60 is: 260,711.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,728.80 : 821,679.60 = 173,789.60 : x
  2. Step 2: Convert to fraction form
    547,728.80/821,679.60 = 173,789.60/x
  3. Step 3: Cross multiply
    547,728.80x = 821,679.60 × 173,789.60
  4. Step 4: Simplify right side
    547,728.80x = 142,799,369,012.16
  5. Step 5: Solve for x
    x = 142,799,369,012.16/547,728.80
  6. Step 6: Final answer
    x = 260,711.81

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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.