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Finding the Fourth Proportional to 309,400.81, 426,890.78 and 178,545.31

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Solution

The fourth proportional to 309,400.81, 426,890.78 and 178,545.31 is: 246,345.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,400.81 : 426,890.78 = 178,545.31 : x
  2. Step 2: Convert to fraction form
    309,400.81/426,890.78 = 178,545.31/x
  3. Step 3: Cross multiply
    309,400.81x = 426,890.78 × 178,545.31
  4. Step 4: Simplify right side
    309,400.81x = 76,219,348,264.25
  5. Step 5: Solve for x
    x = 76,219,348,264.25/309,400.81
  6. Step 6: Final answer
    x = 246,345.02

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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.