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Finding the Fourth Proportional to 485,110.80, 727,666.20 and 343,393.20

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Solution

The fourth proportional to 485,110.80, 727,666.20 and 343,393.20 is: 515,089.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,110.80 : 727,666.20 = 343,393.20 : x
  2. Step 2: Convert to fraction form
    485,110.80/727,666.20 = 343,393.20/x
  3. Step 3: Cross multiply
    485,110.80x = 727,666.20 × 343,393.20
  4. Step 4: Simplify right side
    485,110.80x = 249,875,624,949.84
  5. Step 5: Solve for x
    x = 249,875,624,949.84/485,110.80
  6. Step 6: Final answer
    x = 515,089.80

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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.