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Finding the Fourth Proportional to 485,323.40, 727,812.30 and 219,211.40

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Solution

The fourth proportional to 485,323.40, 727,812.30 and 219,211.40 is: 328,739.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,323.40 : 727,812.30 = 219,211.40 : x
  2. Step 2: Convert to fraction form
    485,323.40/727,812.30 = 219,211.40/x
  3. Step 3: Cross multiply
    485,323.40x = 727,812.30 × 219,211.40
  4. Step 4: Simplify right side
    485,323.40x = 159,544,753,220.22
  5. Step 5: Solve for x
    x = 159,544,753,220.22/485,323.40
  6. Step 6: Final answer
    x = 328,739.05

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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.