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Finding the Fourth Proportional to 354,138.86, 488,572.89 and 217,936.34

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Solution

The fourth proportional to 354,138.86, 488,572.89 and 217,936.34 is: 300,666.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,138.86 : 488,572.89 = 217,936.34 : x
  2. Step 2: Convert to fraction form
    354,138.86/488,572.89 = 217,936.34/x
  3. Step 3: Cross multiply
    354,138.86x = 488,572.89 × 217,936.34
  4. Step 4: Simplify right side
    354,138.86x = 106,477,785,026.96
  5. Step 5: Solve for x
    x = 106,477,785,026.96/354,138.86
  6. Step 6: Final answer
    x = 300,666.77

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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.