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Finding the Fourth Proportional to 539,547.80, 809,321.70 and 439,820.60

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Solution

The fourth proportional to 539,547.80, 809,321.70 and 439,820.60 is: 659,730.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,547.80 : 809,321.70 = 439,820.60 : x
  2. Step 2: Convert to fraction form
    539,547.80/809,321.70 = 439,820.60/x
  3. Step 3: Cross multiply
    539,547.80x = 809,321.70 × 439,820.60
  4. Step 4: Simplify right side
    539,547.80x = 355,956,355,687.02
  5. Step 5: Solve for x
    x = 355,956,355,687.02/539,547.80
  6. Step 6: Final answer
    x = 659,730.90

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Similar ratio
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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.