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Finding the Fourth Proportional to 203,001.12, 280,409.28 and 155,837.28

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Solution

The fourth proportional to 203,001.12, 280,409.28 and 155,837.28 is: 215,260.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,001.12 : 280,409.28 = 155,837.28 : x
  2. Step 2: Convert to fraction form
    203,001.12/280,409.28 = 155,837.28/x
  3. Step 3: Cross multiply
    203,001.12x = 280,409.28 × 155,837.28
  4. Step 4: Simplify right side
    203,001.12x = 43,698,219,481.96
  5. Step 5: Solve for x
    x = 43,698,219,481.96/203,001.12
  6. Step 6: Final answer
    x = 215,260.98

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1.5x scale

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.