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Finding the Fourth Proportional to 420,745.52, 580,628.32 and 248,725.49

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Solution

The fourth proportional to 420,745.52, 580,628.32 and 248,725.49 is: 343,240.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,745.52 : 580,628.32 = 248,725.49 : x
  2. Step 2: Convert to fraction form
    420,745.52/580,628.32 = 248,725.49/x
  3. Step 3: Cross multiply
    420,745.52x = 580,628.32 × 248,725.49
  4. Step 4: Simplify right side
    420,745.52x = 144,417,059,874.92
  5. Step 5: Solve for x
    x = 144,417,059,874.92/420,745.52
  6. Step 6: Final answer
    x = 343,240.87

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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.