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Finding the Fourth Proportional to 547,775.20, 821,662.80 and 387,416.80

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Solution

The fourth proportional to 547,775.20, 821,662.80 and 387,416.80 is: 581,125.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,775.20 : 821,662.80 = 387,416.80 : x
  2. Step 2: Convert to fraction form
    547,775.20/821,662.80 = 387,416.80/x
  3. Step 3: Cross multiply
    547,775.20x = 821,662.80 × 387,416.80
  4. Step 4: Simplify right side
    547,775.20x = 318,325,972,655.04
  5. Step 5: Solve for x
    x = 318,325,972,655.04/547,775.20
  6. Step 6: Final answer
    x = 581,125.20

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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.