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Finding the Fourth Proportional to 381,986,649.81, 572,979,260.03 and 119,691,280.94

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Solution

The fourth proportional to 381,986,649.81, 572,979,260.03 and 119,691,280.94 is: 179,536,697.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,986,649.81 : 572,979,260.03 = 119,691,280.94 : x
  2. Step 2: Convert to fraction form
    381,986,649.81/572,979,260.03 = 119,691,280.94/x
  3. Step 3: Cross multiply
    381,986,649.81x = 572,979,260.03 × 119,691,280.94
  4. Step 4: Simplify right side
    381,986,649.81x = 68,580,621,581,580,688
  5. Step 5: Solve for x
    x = 68,580,621,581,580,688/381,986,649.81
  6. Step 6: Final answer
    x = 179,536,697.46

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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.