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Finding the Fourth Proportional to 309,436.97, 427,058.42 and 173,507.63

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Solution

The fourth proportional to 309,436.97, 427,058.42 and 173,507.63 is: 239,460.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,436.97 : 427,058.42 = 173,507.63 : x
  2. Step 2: Convert to fraction form
    309,436.97/427,058.42 = 173,507.63/x
  3. Step 3: Cross multiply
    309,436.97x = 427,058.42 × 173,507.63
  4. Step 4: Simplify right side
    309,436.97x = 74,097,891,322.91
  5. Step 5: Solve for x
    x = 74,097,891,322.91/309,436.97
  6. Step 6: Final answer
    x = 239,460.37

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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.