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Finding the Fourth Proportional to 521,993.12, 720,326.40 and 295,640.24

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Solution

The fourth proportional to 521,993.12, 720,326.40 and 295,640.24 is: 407,969.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,993.12 : 720,326.40 = 295,640.24 : x
  2. Step 2: Convert to fraction form
    521,993.12/720,326.40 = 295,640.24/x
  3. Step 3: Cross multiply
    521,993.12x = 720,326.40 × 295,640.24
  4. Step 4: Simplify right side
    521,993.12x = 212,957,469,774.34
  5. Step 5: Solve for x
    x = 212,957,469,774.34/521,993.12
  6. Step 6: Final answer
    x = 407,969.88

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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.