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Finding the Fourth Proportional to 381,373.51, 526,257.12 and 228,407.78

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Solution

The fourth proportional to 381,373.51, 526,257.12 and 228,407.78 is: 315,179.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,373.51 : 526,257.12 = 228,407.78 : x
  2. Step 2: Convert to fraction form
    381,373.51/526,257.12 = 228,407.78/x
  3. Step 3: Cross multiply
    381,373.51x = 526,257.12 × 228,407.78
  4. Step 4: Simplify right side
    381,373.51x = 120,201,221,804.04
  5. Step 5: Solve for x
    x = 120,201,221,804.04/381,373.51
  6. Step 6: Final answer
    x = 315,179.79

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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.