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Finding the Fourth Proportional to 556,990.96, 768,376.56 and 330,476.08

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Solution

The fourth proportional to 556,990.96, 768,376.56 and 330,476.08 is: 455,896.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,990.96 : 768,376.56 = 330,476.08 : x
  2. Step 2: Convert to fraction form
    556,990.96/768,376.56 = 330,476.08/x
  3. Step 3: Cross multiply
    556,990.96x = 768,376.56 × 330,476.08
  4. Step 4: Simplify right side
    556,990.96x = 253,930,073,512.69
  5. Step 5: Solve for x
    x = 253,930,073,512.69/556,990.96
  6. Step 6: Final answer
    x = 455,896.22

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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.