Home / 386,905.86-533,929.74-225,729.69

Finding the Fourth Proportional to 386,905.86, 533,929.74 and 225,729.69

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Solution

The fourth proportional to 386,905.86, 533,929.74 and 225,729.69 is: 311,506.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,905.86 : 533,929.74 = 225,729.69 : x
  2. Step 2: Convert to fraction form
    386,905.86/533,929.74 = 225,729.69/x
  3. Step 3: Cross multiply
    386,905.86x = 533,929.74 × 225,729.69
  4. Step 4: Simplify right side
    386,905.86x = 120,523,794,691.98
  5. Step 5: Solve for x
    x = 120,523,794,691.98/386,905.86
  6. Step 6: Final answer
    x = 311,506.77

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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.