Home / 520,109.24-780,341.09-280,247.73

Finding the Fourth Proportional to 520,109.24, 780,341.09 and 280,247.73

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Solution

The fourth proportional to 520,109.24, 780,341.09 and 280,247.73 is: 420,467.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,109.24 : 780,341.09 = 280,247.73 : x
  2. Step 2: Convert to fraction form
    520,109.24/780,341.09 = 280,247.73/x
  3. Step 3: Cross multiply
    520,109.24x = 780,341.09 × 280,247.73
  4. Step 4: Simplify right side
    520,109.24x = 218,688,817,696.99
  5. Step 5: Solve for x
    x = 218,688,817,696.99/520,109.24
  6. Step 6: Final answer
    x = 420,467.09

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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.