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Finding the Fourth Proportional to 414,535.60, 621,803.40 and 315,002.80

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Solution

The fourth proportional to 414,535.60, 621,803.40 and 315,002.80 is: 472,504.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    414,535.60 : 621,803.40 = 315,002.80 : x
  2. Step 2: Convert to fraction form
    414,535.60/621,803.40 = 315,002.80/x
  3. Step 3: Cross multiply
    414,535.60x = 621,803.40 × 315,002.80
  4. Step 4: Simplify right side
    414,535.60x = 195,869,812,049.52
  5. Step 5: Solve for x
    x = 195,869,812,049.52/414,535.60
  6. Step 6: Final answer
    x = 472,504.20

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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.