Home / 419,403.04-578,782.78-228,416.28

Finding the Fourth Proportional to 419,403.04, 578,782.78 and 228,416.28

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Solution

The fourth proportional to 419,403.04, 578,782.78 and 228,416.28 is: 315,218.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,403.04 : 578,782.78 = 228,416.28 : x
  2. Step 2: Convert to fraction form
    419,403.04/578,782.78 = 228,416.28/x
  3. Step 3: Cross multiply
    419,403.04x = 578,782.78 × 228,416.28
  4. Step 4: Simplify right side
    419,403.04x = 132,203,408,079.02
  5. Step 5: Solve for x
    x = 132,203,408,079.02/419,403.04
  6. Step 6: Final answer
    x = 315,218.05

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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.