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Finding the Fourth Proportional to 268,999.79, 371,205.50 and 154,272.50

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Solution

The fourth proportional to 268,999.79, 371,205.50 and 154,272.50 is: 212,887.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,999.79 : 371,205.50 = 154,272.50 : x
  2. Step 2: Convert to fraction form
    268,999.79/371,205.50 = 154,272.50/x
  3. Step 3: Cross multiply
    268,999.79x = 371,205.50 × 154,272.50
  4. Step 4: Simplify right side
    268,999.79x = 57,266,800,655.40
  5. Step 5: Solve for x
    x = 57,266,800,655.40/268,999.79
  6. Step 6: Final answer
    x = 212,887.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.