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Finding the Fourth Proportional to 316,790.18, 436,820.20 and 201,886.90

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Solution

The fourth proportional to 316,790.18, 436,820.20 and 201,886.90 is: 278,380.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,790.18 : 436,820.20 = 201,886.90 : x
  2. Step 2: Convert to fraction form
    316,790.18/436,820.20 = 201,886.90/x
  3. Step 3: Cross multiply
    316,790.18x = 436,820.20 × 201,886.90
  4. Step 4: Simplify right side
    316,790.18x = 88,188,276,035.38
  5. Step 5: Solve for x
    x = 88,188,276,035.38/316,790.18
  6. Step 6: Final answer
    x = 278,380.71

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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.