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Finding the Fourth Proportional to 611,582,512.80, 917,692,633.80 and 266,571,015.60

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Solution

The fourth proportional to 611,582,512.80, 917,692,633.80 and 266,571,015.60 is: 399,995,507.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,582,512.80 : 917,692,633.80 = 266,571,015.60 : x
  2. Step 2: Convert to fraction form
    611,582,512.80/917,692,633.80 = 266,571,015.60/x
  3. Step 3: Cross multiply
    611,582,512.80x = 917,692,633.80 × 266,571,015.60
  4. Step 4: Simplify right side
    611,582,512.80x = 244,630,257,400,704,864
  5. Step 5: Solve for x
    x = 244,630,257,400,704,864/611,582,512.80
  6. Step 6: Final answer
    x = 399,995,507.20

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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.