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Finding the Fourth Proportional to 355,407.78, 533,205.14 and 127,726.39

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Solution

The fourth proportional to 355,407.78, 533,205.14 and 127,726.39 is: 191,623.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,407.78 : 533,205.14 = 127,726.39 : x
  2. Step 2: Convert to fraction form
    355,407.78/533,205.14 = 127,726.39/x
  3. Step 3: Cross multiply
    355,407.78x = 533,205.14 × 127,726.39
  4. Step 4: Simplify right side
    355,407.78x = 68,104,367,661.64
  5. Step 5: Solve for x
    x = 68,104,367,661.64/355,407.78
  6. Step 6: Final answer
    x = 191,623.18

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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.