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Finding the Fourth Proportional to 309,329.94, 426,854.16 and 173,340.66

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Solution

The fourth proportional to 309,329.94, 426,854.16 and 173,340.66 is: 239,198.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,329.94 : 426,854.16 = 173,340.66 : x
  2. Step 2: Convert to fraction form
    309,329.94/426,854.16 = 173,340.66/x
  3. Step 3: Cross multiply
    309,329.94x = 426,854.16 × 173,340.66
  4. Step 4: Simplify right side
    309,329.94x = 73,991,181,818.15
  5. Step 5: Solve for x
    x = 73,991,181,818.15/309,329.94
  6. Step 6: Final answer
    x = 239,198.25

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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.