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Finding the Fourth Proportional to 320,420.52, 480,703.66 and 170,581.86

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Solution

The fourth proportional to 320,420.52, 480,703.66 and 170,581.86 is: 255,911.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,420.52 : 480,703.66 = 170,581.86 : x
  2. Step 2: Convert to fraction form
    320,420.52/480,703.66 = 170,581.86/x
  3. Step 3: Cross multiply
    320,420.52x = 480,703.66 × 170,581.86
  4. Step 4: Simplify right side
    320,420.52x = 81,999,324,431.61
  5. Step 5: Solve for x
    x = 81,999,324,431.61/320,420.52
  6. Step 6: Final answer
    x = 255,911.59

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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.