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Finding the Fourth Proportional to 472,393,313.20, 708,589,969.80 and 426,476,810.80

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Solution

The fourth proportional to 472,393,313.20, 708,589,969.80 and 426,476,810.80 is: 639,715,216.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    472,393,313.20 : 708,589,969.80 = 426,476,810.80 : x
  2. Step 2: Convert to fraction form
    472,393,313.20/708,589,969.80 = 426,476,810.80/x
  3. Step 3: Cross multiply
    472,393,313.20x = 708,589,969.80 × 426,476,810.80
  4. Step 4: Simplify right side
    472,393,313.20x = 302,197,190,485,172,288
  5. Step 5: Solve for x
    x = 302,197,190,485,172,288/472,393,313.20
  6. Step 6: Final answer
    x = 639,715,216.20

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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.