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Finding the Fourth Proportional to 486,008.40, 728,793.90 and 186,389.40

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Solution

The fourth proportional to 486,008.40, 728,793.90 and 186,389.40 is: 279,500.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,008.40 : 728,793.90 = 186,389.40 : x
  2. Step 2: Convert to fraction form
    486,008.40/728,793.90 = 186,389.40/x
  3. Step 3: Cross multiply
    486,008.40x = 728,793.90 × 186,389.40
  4. Step 4: Simplify right side
    486,008.40x = 135,839,457,744.66
  5. Step 5: Solve for x
    x = 135,839,457,744.66/486,008.40
  6. Step 6: Final answer
    x = 279,500.23

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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.