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Finding the Fourth Proportional to 485,976.88, 670,419.48 and 316,149.04

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Solution

The fourth proportional to 485,976.88, 670,419.48 and 316,149.04 is: 436,136.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,976.88 : 670,419.48 = 316,149.04 : x
  2. Step 2: Convert to fraction form
    485,976.88/670,419.48 = 316,149.04/x
  3. Step 3: Cross multiply
    485,976.88x = 670,419.48 × 316,149.04
  4. Step 4: Simplify right side
    485,976.88x = 211,952,474,999.30
  5. Step 5: Solve for x
    x = 211,952,474,999.30/485,976.88
  6. Step 6: Final answer
    x = 436,136.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.