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Finding the Fourth Proportional to 484,080.80, 726,121.20 and 390,768.80

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Solution

The fourth proportional to 484,080.80, 726,121.20 and 390,768.80 is: 586,153.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    484,080.80 : 726,121.20 = 390,768.80 : x
  2. Step 2: Convert to fraction form
    484,080.80/726,121.20 = 390,768.80/x
  3. Step 3: Cross multiply
    484,080.80x = 726,121.20 × 390,768.80
  4. Step 4: Simplify right side
    484,080.80x = 283,745,509,978.56
  5. Step 5: Solve for x
    x = 283,745,509,978.56/484,080.80
  6. Step 6: Final answer
    x = 586,153.20

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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.