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Finding the Fourth Proportional to 426,408.70, 638,593.34 and 245,947.06

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Solution

The fourth proportional to 426,408.70, 638,593.34 and 245,947.06 is: 368,332.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,408.70 : 638,593.34 = 245,947.06 : x
  2. Step 2: Convert to fraction form
    426,408.70/638,593.34 = 245,947.06/x
  3. Step 3: Cross multiply
    426,408.70x = 638,593.34 × 245,947.06
  4. Step 4: Simplify right side
    426,408.70x = 157,060,154,508.58
  5. Step 5: Solve for x
    x = 157,060,154,508.58/426,408.70
  6. Step 6: Final answer
    x = 368,332.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.