Home / 540,123.20-809,666.40-420,113.60

Finding the Fourth Proportional to 540,123.20, 809,666.40 and 420,113.60

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Solution

The fourth proportional to 540,123.20, 809,666.40 and 420,113.60 is: 629,767.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    540,123.20 : 809,666.40 = 420,113.60 : x
  2. Step 2: Convert to fraction form
    540,123.20/809,666.40 = 420,113.60/x
  3. Step 3: Cross multiply
    540,123.20x = 809,666.40 × 420,113.60
  4. Step 4: Simplify right side
    540,123.20x = 340,151,866,103.04
  5. Step 5: Solve for x
    x = 340,151,866,103.04/540,123.20
  6. Step 6: Final answer
    x = 629,767.18

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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.