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Finding the Fourth Proportional to 320,994.28, 481,479.90 and 121,306.60

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Solution

The fourth proportional to 320,994.28, 481,479.90 and 121,306.60 is: 181,955.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,994.28 : 481,479.90 = 121,306.60 : x
  2. Step 2: Convert to fraction form
    320,994.28/481,479.90 = 121,306.60/x
  3. Step 3: Cross multiply
    320,994.28x = 481,479.90 × 121,306.60
  4. Step 4: Simplify right side
    320,994.28x = 58,406,689,637.34
  5. Step 5: Solve for x
    x = 58,406,689,637.34/320,994.28
  6. Step 6: Final answer
    x = 181,955.55

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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.