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Finding the Fourth Proportional to 355,419.48, 533,222.55 and 127,738.08

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Solution

The fourth proportional to 355,419.48, 533,222.55 and 127,738.08 is: 191,640.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,419.48 : 533,222.55 = 127,738.08 : x
  2. Step 2: Convert to fraction form
    355,419.48/533,222.55 = 127,738.08/x
  3. Step 3: Cross multiply
    355,419.48x = 533,222.55 × 127,738.08
  4. Step 4: Simplify right side
    355,419.48x = 68,112,824,749.70
  5. Step 5: Solve for x
    x = 68,112,824,749.70/355,419.48
  6. Step 6: Final answer
    x = 191,640.66

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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.