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Finding the Fourth Proportional to 661,097.88, 912,236.31 and 389,105.46

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Solution

The fourth proportional to 661,097.88, 912,236.31 and 389,105.46 is: 536,919.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,097.88 : 912,236.31 = 389,105.46 : x
  2. Step 2: Convert to fraction form
    661,097.88/912,236.31 = 389,105.46/x
  3. Step 3: Cross multiply
    661,097.88x = 912,236.31 × 389,105.46
  4. Step 4: Simplify right side
    661,097.88x = 354,956,129,031.25
  5. Step 5: Solve for x
    x = 354,956,129,031.25/661,097.88
  6. Step 6: Final answer
    x = 536,919.18

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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.