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Finding the Fourth Proportional to 547,398.78, 755,245.25 and 317,911.83

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Solution

The fourth proportional to 547,398.78, 755,245.25 and 317,911.83 is: 438,622.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,398.78 : 755,245.25 = 317,911.83 : x
  2. Step 2: Convert to fraction form
    547,398.78/755,245.25 = 317,911.83/x
  3. Step 3: Cross multiply
    547,398.78x = 755,245.25 × 317,911.83
  4. Step 4: Simplify right side
    547,398.78x = 240,101,401,355.17
  5. Step 5: Solve for x
    x = 240,101,401,355.17/547,398.78
  6. Step 6: Final answer
    x = 438,622.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.