Home / 519,712.20-778,985.10-220,141.80

Finding the Fourth Proportional to 519,712.20, 778,985.10 and 220,141.80

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Solution

The fourth proportional to 519,712.20, 778,985.10 and 220,141.80 is: 329,965.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,712.20 : 778,985.10 = 220,141.80 : x
  2. Step 2: Convert to fraction form
    519,712.20/778,985.10 = 220,141.80/x
  3. Step 3: Cross multiply
    519,712.20x = 778,985.10 × 220,141.80
  4. Step 4: Simplify right side
    519,712.20x = 171,487,182,087.18
  5. Step 5: Solve for x
    x = 171,487,182,087.18/519,712.20
  6. Step 6: Final answer
    x = 329,965.67

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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.