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Finding the Fourth Proportional to 423,828.44, 635,503.02 and 139,442.03

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Solution

The fourth proportional to 423,828.44, 635,503.02 and 139,442.03 is: 209,084.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,828.44 : 635,503.02 = 139,442.03 : x
  2. Step 2: Convert to fraction form
    423,828.44/635,503.02 = 139,442.03/x
  3. Step 3: Cross multiply
    423,828.44x = 635,503.02 × 139,442.03
  4. Step 4: Simplify right side
    423,828.44x = 88,615,831,179.93
  5. Step 5: Solve for x
    x = 88,615,831,179.93/423,828.44
  6. Step 6: Final answer
    x = 209,084.20

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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.