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Finding the Fourth Proportional to 539,395.20, 809,758.40 and 339,715.20

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Solution

The fourth proportional to 539,395.20, 809,758.40 and 339,715.20 is: 509,992.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,395.20 : 809,758.40 = 339,715.20 : x
  2. Step 2: Convert to fraction form
    539,395.20/809,758.40 = 339,715.20/x
  3. Step 3: Cross multiply
    539,395.20x = 809,758.40 × 339,715.20
  4. Step 4: Simplify right side
    539,395.20x = 275,087,236,807.68
  5. Step 5: Solve for x
    x = 275,087,236,807.68/539,395.20
  6. Step 6: Final answer
    x = 509,992.00

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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.