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Finding the Fourth Proportional to 485,116.80, 727,675.20 and 343,399.20

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Solution

The fourth proportional to 485,116.80, 727,675.20 and 343,399.20 is: 515,098.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,116.80 : 727,675.20 = 343,399.20 : x
  2. Step 2: Convert to fraction form
    485,116.80/727,675.20 = 343,399.20/x
  3. Step 3: Cross multiply
    485,116.80x = 727,675.20 × 343,399.20
  4. Step 4: Simplify right side
    485,116.80x = 249,883,081,539.84
  5. Step 5: Solve for x
    x = 249,883,081,539.84/485,116.80
  6. Step 6: Final answer
    x = 515,098.80

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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.