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Finding the Fourth Proportional to 545,042.86, 817,530.62 and 203,419.78

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Solution

The fourth proportional to 545,042.86, 817,530.62 and 203,419.78 is: 305,117.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,042.86 : 817,530.62 = 203,419.78 : x
  2. Step 2: Convert to fraction form
    545,042.86/817,530.62 = 203,419.78/x
  3. Step 3: Cross multiply
    545,042.86x = 817,530.62 × 203,419.78
  4. Step 4: Simplify right side
    545,042.86x = 166,301,898,863.66
  5. Step 5: Solve for x
    x = 166,301,898,863.66/545,042.86
  6. Step 6: Final answer
    x = 305,117.10

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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.