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Finding the Fourth Proportional to 547,712.20, 821,568.30 and 505,721.80

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Solution

The fourth proportional to 547,712.20, 821,568.30 and 505,721.80 is: 758,582.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,712.20 : 821,568.30 = 505,721.80 : x
  2. Step 2: Convert to fraction form
    547,712.20/821,568.30 = 505,721.80/x
  3. Step 3: Cross multiply
    547,712.20x = 821,568.30 × 505,721.80
  4. Step 4: Simplify right side
    547,712.20x = 415,484,999,498.94
  5. Step 5: Solve for x
    x = 415,484,999,498.94/547,712.20
  6. Step 6: Final answer
    x = 758,582.70

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Similar ratio
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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.