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Finding the Fourth Proportional to 485,093,999.80, 727,640,999.70 and 242,669,423.80

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Solution

The fourth proportional to 485,093,999.80, 727,640,999.70 and 242,669,423.80 is: 364,004,135.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,093,999.80 : 727,640,999.70 = 242,669,423.80 : x
  2. Step 2: Convert to fraction form
    485,093,999.80/727,640,999.70 = 242,669,423.80/x
  3. Step 3: Cross multiply
    485,093,999.80x = 727,640,999.70 × 242,669,423.80
  4. Step 4: Simplify right side
    485,093,999.80x = 176,576,222,130,455,008
  5. Step 5: Solve for x
    x = 176,576,222,130,455,008/485,093,999.80
  6. Step 6: Final answer
    x = 364,004,135.70

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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.