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Finding the Fourth Proportional to 435,487, 653,230.50 and 139,999

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Solution

The fourth proportional to 435,487, 653,230.50 and 139,999 is: 209,998.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    435,487 : 653,230.50 = 139,999 : x
  2. Step 2: Convert to fraction form
    435,487/653,230.50 = 139,999/x
  3. Step 3: Cross multiply
    435,487x = 653,230.50 × 139,999
  4. Step 4: Simplify right side
    435,487x = 91,451,616,769.50
  5. Step 5: Solve for x
    x = 91,451,616,769.50/435,487
  6. Step 6: Final answer
    x = 209,998.50

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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.