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Finding the Fourth Proportional to 368,811.62, 509,009.49 and 215,896.58

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Solution

The fourth proportional to 368,811.62, 509,009.49 and 215,896.58 is: 297,966.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,811.62 : 509,009.49 = 215,896.58 : x
  2. Step 2: Convert to fraction form
    368,811.62/509,009.49 = 215,896.58/x
  3. Step 3: Cross multiply
    368,811.62x = 509,009.49 × 215,896.58
  4. Step 4: Simplify right side
    368,811.62x = 109,893,408,078.54
  5. Step 5: Solve for x
    x = 109,893,408,078.54/368,811.62
  6. Step 6: Final answer
    x = 297,966.23

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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.