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Finding the Fourth Proportional to 520,429.20, 780,060.60 and 220,858.80

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Solution

The fourth proportional to 520,429.20, 780,060.60 and 220,858.80 is: 331,040.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,429.20 : 780,060.60 = 220,858.80 : x
  2. Step 2: Convert to fraction form
    520,429.20/780,060.60 = 220,858.80/x
  3. Step 3: Cross multiply
    520,429.20x = 780,060.60 × 220,858.80
  4. Step 4: Simplify right side
    520,429.20x = 172,283,248,043.28
  5. Step 5: Solve for x
    x = 172,283,248,043.28/520,429.20
  6. Step 6: Final answer
    x = 331,040.70

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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.