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Finding the Fourth Proportional to 547,712.70, 821,569.05 and 505,722.30

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Solution

The fourth proportional to 547,712.70, 821,569.05 and 505,722.30 is: 758,583.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,712.70 : 821,569.05 = 505,722.30 : x
  2. Step 2: Convert to fraction form
    547,712.70/821,569.05 = 505,722.30/x
  3. Step 3: Cross multiply
    547,712.70x = 821,569.05 × 505,722.30
  4. Step 4: Simplify right side
    547,712.70x = 415,485,789,574.82
  5. Step 5: Solve for x
    x = 415,485,789,574.82/547,712.70
  6. Step 6: Final answer
    x = 758,583.45

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Double scale
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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.