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Finding the Fourth Proportional to 486,978.80, 730,468.20 and 368,880.80

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Solution

The fourth proportional to 486,978.80, 730,468.20 and 368,880.80 is: 553,321.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,978.80 : 730,468.20 = 368,880.80 : x
  2. Step 2: Convert to fraction form
    486,978.80/730,468.20 = 368,880.80/x
  3. Step 3: Cross multiply
    486,978.80x = 730,468.20 × 368,880.80
  4. Step 4: Simplify right side
    486,978.80x = 269,455,693,990.56
  5. Step 5: Solve for x
    x = 269,455,693,990.56/486,978.80
  6. Step 6: Final answer
    x = 553,321.20

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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.