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Finding the Fourth Proportional to 485,649.48, 728,561.88 and 219,535.32

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Solution

The fourth proportional to 485,649.48, 728,561.88 and 219,535.32 is: 329,342.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,649.48 : 728,561.88 = 219,535.32 : x
  2. Step 2: Convert to fraction form
    485,649.48/728,561.88 = 219,535.32/x
  3. Step 3: Cross multiply
    485,649.48x = 728,561.88 × 219,535.32
  4. Step 4: Simplify right side
    485,649.48x = 159,945,065,465.60
  5. Step 5: Solve for x
    x = 159,945,065,465.60/485,649.48
  6. Step 6: Final answer
    x = 329,342.61

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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.