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Finding the Fourth Proportional to 485,097.96, 669,395.43 and 278,375.43

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Solution

The fourth proportional to 485,097.96, 669,395.43 and 278,375.43 is: 384,135.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,097.96 : 669,395.43 = 278,375.43 : x
  2. Step 2: Convert to fraction form
    485,097.96/669,395.43 = 278,375.43/x
  3. Step 3: Cross multiply
    485,097.96x = 669,395.43 × 278,375.43
  4. Step 4: Simplify right side
    485,097.96x = 186,343,240,666.29
  5. Step 5: Solve for x
    x = 186,343,240,666.29/485,097.96
  6. Step 6: Final answer
    x = 384,135.28

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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.