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Finding the Fourth Proportional to 351,286.80, 526,931.55 and 85,046.91

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Solution

The fourth proportional to 351,286.80, 526,931.55 and 85,046.91 is: 127,570.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,286.80 : 526,931.55 = 85,046.91 : x
  2. Step 2: Convert to fraction form
    351,286.80/526,931.55 = 85,046.91/x
  3. Step 3: Cross multiply
    351,286.80x = 526,931.55 × 85,046.91
  4. Step 4: Simplify right side
    351,286.80x = 44,813,900,109.01
  5. Step 5: Solve for x
    x = 44,813,900,109.01/351,286.80
  6. Step 6: Final answer
    x = 127,570.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.