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Finding the Fourth Proportional to 245,679.92, 339,055.44 and 138,260.24

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Solution

The fourth proportional to 245,679.92, 339,055.44 and 138,260.24 is: 190,808.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,679.92 : 339,055.44 = 138,260.24 : x
  2. Step 2: Convert to fraction form
    245,679.92/339,055.44 = 138,260.24/x
  3. Step 3: Cross multiply
    245,679.92x = 339,055.44 × 138,260.24
  4. Step 4: Simplify right side
    245,679.92x = 46,877,886,507.71
  5. Step 5: Solve for x
    x = 46,877,886,507.71/245,679.92
  6. Step 6: Final answer
    x = 190,808.78

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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.