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Finding the Fourth Proportional to 393,687.63, 590,386.55 and 309,612.06

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Solution

The fourth proportional to 393,687.63, 590,386.55 and 309,612.06 is: 464,304.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,687.63 : 590,386.55 = 309,612.06 : x
  2. Step 2: Convert to fraction form
    393,687.63/590,386.55 = 309,612.06/x
  3. Step 3: Cross multiply
    393,687.63x = 590,386.55 × 309,612.06
  4. Step 4: Simplify right side
    393,687.63x = 182,790,794,393.73
  5. Step 5: Solve for x
    x = 182,790,794,393.73/393,687.63
  6. Step 6: Final answer
    x = 464,304.13

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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.