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Finding the Fourth Proportional to 386,448.30, 579,672.45 and 173,215.80

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Solution

The fourth proportional to 386,448.30, 579,672.45 and 173,215.80 is: 259,823.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,448.30 : 579,672.45 = 173,215.80 : x
  2. Step 2: Convert to fraction form
    386,448.30/579,672.45 = 173,215.80/x
  3. Step 3: Cross multiply
    386,448.30x = 579,672.45 × 173,215.80
  4. Step 4: Simplify right side
    386,448.30x = 100,408,427,164.71
  5. Step 5: Solve for x
    x = 100,408,427,164.71/386,448.30
  6. Step 6: Final answer
    x = 259,823.70

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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.