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Finding the Fourth Proportional to 480,012.80, 720,019.20 and 439,577.60

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Solution

The fourth proportional to 480,012.80, 720,019.20 and 439,577.60 is: 659,366.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,012.80 : 720,019.20 = 439,577.60 : x
  2. Step 2: Convert to fraction form
    480,012.80/720,019.20 = 439,577.60/x
  3. Step 3: Cross multiply
    480,012.80x = 720,019.20 × 439,577.60
  4. Step 4: Simplify right side
    480,012.80x = 316,504,311,889.92
  5. Step 5: Solve for x
    x = 316,504,311,889.92/480,012.80
  6. Step 6: Final answer
    x = 659,366.40

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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.