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Finding the Fourth Proportional to 420,717.98, 580,514.34 and 248,664.87

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Solution

The fourth proportional to 420,717.98, 580,514.34 and 248,664.87 is: 343,112.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,717.98 : 580,514.34 = 248,664.87 : x
  2. Step 2: Convert to fraction form
    420,717.98/580,514.34 = 248,664.87/x
  3. Step 3: Cross multiply
    420,717.98x = 580,514.34 × 248,664.87
  4. Step 4: Simplify right side
    420,717.98x = 144,353,523,821.73
  5. Step 5: Solve for x
    x = 144,353,523,821.73/420,717.98
  6. Step 6: Final answer
    x = 343,112.32

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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.