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Finding the Fourth Proportional to 423,238.86, 634,845.99 and 123,726.48

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Solution

The fourth proportional to 423,238.86, 634,845.99 and 123,726.48 is: 185,586.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,238.86 : 634,845.99 = 123,726.48 : x
  2. Step 2: Convert to fraction form
    423,238.86/634,845.99 = 123,726.48/x
  3. Step 3: Cross multiply
    423,238.86x = 634,845.99 × 123,726.48
  4. Step 4: Simplify right side
    423,238.86x = 78,547,259,684.82
  5. Step 5: Solve for x
    x = 78,547,259,684.82/423,238.86
  6. Step 6: Final answer
    x = 185,586.12

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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.