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Finding the Fourth Proportional to 354,356.32, 531,443.76 and 104,980

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Solution

The fourth proportional to 354,356.32, 531,443.76 and 104,980 is: 157,443.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,356.32 : 531,443.76 = 104,980 : x
  2. Step 2: Convert to fraction form
    354,356.32/531,443.76 = 104,980/x
  3. Step 3: Cross multiply
    354,356.32x = 531,443.76 × 104,980
  4. Step 4: Simplify right side
    354,356.32x = 55,790,965,924.80
  5. Step 5: Solve for x
    x = 55,790,965,924.80/354,356.32
  6. Step 6: Final answer
    x = 157,443.12

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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.