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Finding the Fourth Proportional to 313,221.00, 432,021.57 and 287,462.55

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Solution

The fourth proportional to 313,221.00, 432,021.57 and 287,462.55 is: 396,493.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,221.00 : 432,021.57 = 287,462.55 : x
  2. Step 2: Convert to fraction form
    313,221.00/432,021.57 = 287,462.55/x
  3. Step 3: Cross multiply
    313,221.00x = 432,021.57 × 287,462.55
  4. Step 4: Simplify right side
    313,221.00x = 124,190,021,489.58
  5. Step 5: Solve for x
    x = 124,190,021,489.58/313,221.00
  6. Step 6: Final answer
    x = 396,493.28

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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.