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Finding the Fourth Proportional to 547,765.80, 821,648.70 and 336,719.40

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Solution

The fourth proportional to 547,765.80, 821,648.70 and 336,719.40 is: 505,079.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,765.80 : 821,648.70 = 336,719.40 : x
  2. Step 2: Convert to fraction form
    547,765.80/821,648.70 = 336,719.40/x
  3. Step 3: Cross multiply
    547,765.80x = 821,648.70 × 336,719.40
  4. Step 4: Simplify right side
    547,765.80x = 276,665,057,274.78
  5. Step 5: Solve for x
    x = 276,665,057,274.78/547,765.80
  6. Step 6: Final answer
    x = 505,079.10

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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.