Home / 520,022.20-778,478.10-309,551.80

Finding the Fourth Proportional to 520,022.20, 778,478.10 and 309,551.80

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Solution

The fourth proportional to 520,022.20, 778,478.10 and 309,551.80 is: 463,401.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,022.20 : 778,478.10 = 309,551.80 : x
  2. Step 2: Convert to fraction form
    520,022.20/778,478.10 = 309,551.80/x
  3. Step 3: Cross multiply
    520,022.20x = 778,478.10 × 309,551.80
  4. Step 4: Simplify right side
    520,022.20x = 240,979,297,115.58
  5. Step 5: Solve for x
    x = 240,979,297,115.58/520,022.20
  6. Step 6: Final answer
    x = 463,401.94

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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.