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Finding the Fourth Proportional to 708,395.43, 977,586.44 and 386,105.79

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Solution

The fourth proportional to 708,395.43, 977,586.44 and 386,105.79 is: 532,826.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,395.43 : 977,586.44 = 386,105.79 : x
  2. Step 2: Convert to fraction form
    708,395.43/977,586.44 = 386,105.79/x
  3. Step 3: Cross multiply
    708,395.43x = 977,586.44 × 386,105.79
  4. Step 4: Simplify right side
    708,395.43x = 377,451,782,778.96
  5. Step 5: Solve for x
    x = 377,451,782,778.96/708,395.43
  6. Step 6: Final answer
    x = 532,826.39

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.