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Finding the Fourth Proportional to 407,530,480.80, 611,295,721.20 and 407,530,480.80

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Solution

The fourth proportional to 407,530,480.80, 611,295,721.20 and 407,530,480.80 is: 611,295,721.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,530,480.80 : 611,295,721.20 = 407,530,480.80 : x
  2. Step 2: Convert to fraction form
    407,530,480.80/611,295,721.20 = 407,530,480.80/x
  3. Step 3: Cross multiply
    407,530,480.80x = 611,295,721.20 × 407,530,480.80
  4. Step 4: Simplify right side
    407,530,480.80x = 249,121,639,171,618,784
  5. Step 5: Solve for x
    x = 249,121,639,171,618,784/407,530,480.80
  6. Step 6: Final answer
    x = 611,295,721.20

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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.