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Finding the Fourth Proportional to 520,099.80, 779,717.70 and 220,810.20

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Solution

The fourth proportional to 520,099.80, 779,717.70 and 220,810.20 is: 331,031.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,099.80 : 779,717.70 = 220,810.20 : x
  2. Step 2: Convert to fraction form
    520,099.80/779,717.70 = 220,810.20/x
  3. Step 3: Cross multiply
    520,099.80x = 779,717.70 × 220,810.20
  4. Step 4: Simplify right side
    520,099.80x = 172,169,621,280.54
  5. Step 5: Solve for x
    x = 172,169,621,280.54/520,099.80
  6. Step 6: Final answer
    x = 331,031.89

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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.