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Finding the Fourth Proportional to 286,343.90, 395,143.76 and 159,027.70

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Solution

The fourth proportional to 286,343.90, 395,143.76 and 159,027.70 is: 219,452.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,343.90 : 395,143.76 = 159,027.70 : x
  2. Step 2: Convert to fraction form
    286,343.90/395,143.76 = 159,027.70/x
  3. Step 3: Cross multiply
    286,343.90x = 395,143.76 × 159,027.70
  4. Step 4: Simplify right side
    286,343.90x = 62,838,801,078.09
  5. Step 5: Solve for x
    x = 62,838,801,078.09/286,343.90
  6. Step 6: Final answer
    x = 219,452.21

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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.