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Finding the Fourth Proportional to 548,179.20, 756,518.40 and 309,715.20

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Solution

The fourth proportional to 548,179.20, 756,518.40 and 309,715.20 is: 427,424.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,179.20 : 756,518.40 = 309,715.20 : x
  2. Step 2: Convert to fraction form
    548,179.20/756,518.40 = 309,715.20/x
  3. Step 3: Cross multiply
    548,179.20x = 756,518.40 × 309,715.20
  4. Step 4: Simplify right side
    548,179.20x = 234,305,247,559.68
  5. Step 5: Solve for x
    x = 234,305,247,559.68/548,179.20
  6. Step 6: Final answer
    x = 427,424.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.