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Finding the Fourth Proportional to 520,120.40, 780,180.60 and 307,230.80

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Solution

The fourth proportional to 520,120.40, 780,180.60 and 307,230.80 is: 460,846.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,120.40 : 780,180.60 = 307,230.80 : x
  2. Step 2: Convert to fraction form
    520,120.40/780,180.60 = 307,230.80/x
  3. Step 3: Cross multiply
    520,120.40x = 780,180.60 × 307,230.80
  4. Step 4: Simplify right side
    520,120.40x = 239,695,509,882.48
  5. Step 5: Solve for x
    x = 239,695,509,882.48/520,120.40
  6. Step 6: Final answer
    x = 460,846.20

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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.