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Finding the Fourth Proportional to 368,638.08, 509,016 and 239,640.48

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Solution

The fourth proportional to 368,638.08, 509,016 and 239,640.48 is: 330,895.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,638.08 : 509,016 = 239,640.48 : x
  2. Step 2: Convert to fraction form
    368,638.08/509,016 = 239,640.48/x
  3. Step 3: Cross multiply
    368,638.08x = 509,016 × 239,640.48
  4. Step 4: Simplify right side
    368,638.08x = 121,980,838,567.68
  5. Step 5: Solve for x
    x = 121,980,838,567.68/368,638.08
  6. Step 6: Final answer
    x = 330,895.93

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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.