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Finding the Fourth Proportional to 691,761.25, 954,630.53 and 389,955.25

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Solution

The fourth proportional to 691,761.25, 954,630.53 and 389,955.25 is: 538,138.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,761.25 : 954,630.53 = 389,955.25 : x
  2. Step 2: Convert to fraction form
    691,761.25/954,630.53 = 389,955.25/x
  3. Step 3: Cross multiply
    691,761.25x = 954,630.53 × 389,955.25
  4. Step 4: Simplify right side
    691,761.25x = 372,263,186,983.78
  5. Step 5: Solve for x
    x = 372,263,186,983.78/691,761.25
  6. Step 6: Final answer
    x = 538,138.25

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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.