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Finding the Fourth Proportional to 393,927.81, 590,842.38 and 109,639.68

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Solution

The fourth proportional to 393,927.81, 590,842.38 and 109,639.68 is: 164,445.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,927.81 : 590,842.38 = 109,639.68 : x
  2. Step 2: Convert to fraction form
    393,927.81/590,842.38 = 109,639.68/x
  3. Step 3: Cross multiply
    393,927.81x = 590,842.38 × 109,639.68
  4. Step 4: Simplify right side
    393,927.81x = 64,779,769,473.64
  5. Step 5: Solve for x
    x = 64,779,769,473.64/393,927.81
  6. Step 6: Final answer
    x = 164,445.79

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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.