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Finding the Fourth Proportional to 393,855.48, 590,637.30 and 309,779.10

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Solution

The fourth proportional to 393,855.48, 590,637.30 and 309,779.10 is: 464,553.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,855.48 : 590,637.30 = 309,779.10 : x
  2. Step 2: Convert to fraction form
    393,855.48/590,637.30 = 309,779.10/x
  3. Step 3: Cross multiply
    393,855.48x = 590,637.30 × 309,779.10
  4. Step 4: Simplify right side
    393,855.48x = 182,967,091,220.43
  5. Step 5: Solve for x
    x = 182,967,091,220.43/393,855.48
  6. Step 6: Final answer
    x = 464,553.88

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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.