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Finding the Fourth Proportional to 399,220.60, 598,831.62 and 266,360.44

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Solution

The fourth proportional to 399,220.60, 598,831.62 and 266,360.44 is: 399,541.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,220.60 : 598,831.62 = 266,360.44 : x
  2. Step 2: Convert to fraction form
    399,220.60/598,831.62 = 266,360.44/x
  3. Step 3: Cross multiply
    399,220.60x = 598,831.62 × 266,360.44
  4. Step 4: Simplify right side
    399,220.60x = 159,505,053,789.11
  5. Step 5: Solve for x
    x = 159,505,053,789.11/399,220.60
  6. Step 6: Final answer
    x = 399,541.14

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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.