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Finding the Fourth Proportional to 309,331.68, 426,907.68 and 173,388.72

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Solution

The fourth proportional to 309,331.68, 426,907.68 and 173,388.72 is: 239,293.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,331.68 : 426,907.68 = 173,388.72 : x
  2. Step 2: Convert to fraction form
    309,331.68/426,907.68 = 173,388.72/x
  3. Step 3: Cross multiply
    309,331.68x = 426,907.68 × 173,388.72
  4. Step 4: Simplify right side
    309,331.68x = 74,020,976,193.37
  5. Step 5: Solve for x
    x = 74,020,976,193.37/309,331.68
  6. Step 6: Final answer
    x = 239,293.23

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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.