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Finding the Fourth Proportional to 645,928, 891,380.64 and 363,304

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Solution

The fourth proportional to 645,928, 891,380.64 and 363,304 is: 501,359.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,928 : 891,380.64 = 363,304 : x
  2. Step 2: Convert to fraction form
    645,928/891,380.64 = 363,304/x
  3. Step 3: Cross multiply
    645,928x = 891,380.64 × 363,304
  4. Step 4: Simplify right side
    645,928x = 323,842,152,034.56
  5. Step 5: Solve for x
    x = 323,842,152,034.56/645,928
  6. Step 6: Final answer
    x = 501,359.52

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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.