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Finding the Fourth Proportional to 309,344.94, 426,874.86 and 173,355.66

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Solution

The fourth proportional to 309,344.94, 426,874.86 and 173,355.66 is: 239,218.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,344.94 : 426,874.86 = 173,355.66 : x
  2. Step 2: Convert to fraction form
    309,344.94/426,874.86 = 173,355.66/x
  3. Step 3: Cross multiply
    309,344.94x = 426,874.86 × 173,355.66
  4. Step 4: Simplify right side
    309,344.94x = 74,001,173,092.71
  5. Step 5: Solve for x
    x = 74,001,173,092.71/309,344.94
  6. Step 6: Final answer
    x = 239,218.95

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1.5x scale

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.