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Finding the Fourth Proportional to 363,411.72, 544,919.74 and 126,690.76

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Solution

The fourth proportional to 363,411.72, 544,919.74 and 126,690.76 is: 189,967.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,411.72 : 544,919.74 = 126,690.76 : x
  2. Step 2: Convert to fraction form
    363,411.72/544,919.74 = 126,690.76/x
  3. Step 3: Cross multiply
    363,411.72x = 544,919.74 × 126,690.76
  4. Step 4: Simplify right side
    363,411.72x = 69,036,295,999.60
  5. Step 5: Solve for x
    x = 69,036,295,999.60/363,411.72
  6. Step 6: Final answer
    x = 189,967.17

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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.