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Finding the Fourth Proportional to 435,486, 653,229 and 139,998

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Solution

The fourth proportional to 435,486, 653,229 and 139,998 is: 209,997

Step by Step Solution

  1. Step 1: Write the proportion equation
    435,486 : 653,229 = 139,998 : x
  2. Step 2: Convert to fraction form
    435,486/653,229 = 139,998/x
  3. Step 3: Cross multiply
    435,486x = 653,229 × 139,998
  4. Step 4: Simplify right side
    435,486x = 91,450,753,542
  5. Step 5: Solve for x
    x = 91,450,753,542/435,486
  6. Step 6: Final answer
    x = 209,997

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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.