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Finding the Fourth Proportional to 720,405.44, 994,463.20 and 487,883.60

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Solution

The fourth proportional to 720,405.44, 994,463.20 and 487,883.60 is: 673,485.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,405.44 : 994,463.20 = 487,883.60 : x
  2. Step 2: Convert to fraction form
    720,405.44/994,463.20 = 487,883.60/x
  3. Step 3: Cross multiply
    720,405.44x = 994,463.20 × 487,883.60
  4. Step 4: Simplify right side
    720,405.44x = 485,182,286,083.52
  5. Step 5: Solve for x
    x = 485,182,286,083.52/720,405.44
  6. Step 6: Final answer
    x = 673,485.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.