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Finding the Fourth Proportional to 393,805.80, 590,708.70 and 365,812.20

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Solution

The fourth proportional to 393,805.80, 590,708.70 and 365,812.20 is: 548,718.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,805.80 : 590,708.70 = 365,812.20 : x
  2. Step 2: Convert to fraction form
    393,805.80/590,708.70 = 365,812.20/x
  3. Step 3: Cross multiply
    393,805.80x = 590,708.70 × 365,812.20
  4. Step 4: Simplify right side
    393,805.80x = 216,088,449,106.14
  5. Step 5: Solve for x
    x = 216,088,449,106.14/393,805.80
  6. Step 6: Final answer
    x = 548,718.30

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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.