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Finding the Fourth Proportional to 403,679.60, 606,831.60 and 345,942.80

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Solution

The fourth proportional to 403,679.60, 606,831.60 and 345,942.80 is: 520,038.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,679.60 : 606,831.60 = 345,942.80 : x
  2. Step 2: Convert to fraction form
    403,679.60/606,831.60 = 345,942.80/x
  3. Step 3: Cross multiply
    403,679.60x = 606,831.60 × 345,942.80
  4. Step 4: Simplify right side
    403,679.60x = 209,929,022,832.48
  5. Step 5: Solve for x
    x = 209,929,022,832.48/403,679.60
  6. Step 6: Final answer
    x = 520,038.72

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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.