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Finding the Fourth Proportional to 539,458.40, 809,479.20 and 239,985.20

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Solution

The fourth proportional to 539,458.40, 809,479.20 and 239,985.20 is: 360,107.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,458.40 : 809,479.20 = 239,985.20 : x
  2. Step 2: Convert to fraction form
    539,458.40/809,479.20 = 239,985.20/x
  3. Step 3: Cross multiply
    539,458.40x = 809,479.20 × 239,985.20
  4. Step 4: Simplify right side
    539,458.40x = 194,263,027,707.84
  5. Step 5: Solve for x
    x = 194,263,027,707.84/539,458.40
  6. Step 6: Final answer
    x = 360,107.52

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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.