Home / 345,387.21-518,198.45-210,720.88

Finding the Fourth Proportional to 345,387.21, 518,198.45 and 210,720.88

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Solution

The fourth proportional to 345,387.21, 518,198.45 and 210,720.88 is: 316,153.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,387.21 : 518,198.45 = 210,720.88 : x
  2. Step 2: Convert to fraction form
    345,387.21/518,198.45 = 210,720.88/x
  3. Step 3: Cross multiply
    345,387.21x = 518,198.45 × 210,720.88
  4. Step 4: Simplify right side
    345,387.21x = 109,195,230,077.91
  5. Step 5: Solve for x
    x = 109,195,230,077.91/345,387.21
  6. Step 6: Final answer
    x = 316,153.08

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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.