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Finding the Fourth Proportional to 711,573.12, 981,969.12 and 389,282.40

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Solution

The fourth proportional to 711,573.12, 981,969.12 and 389,282.40 is: 537,208.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,573.12 : 981,969.12 = 389,282.40 : x
  2. Step 2: Convert to fraction form
    711,573.12/981,969.12 = 389,282.40/x
  3. Step 3: Cross multiply
    711,573.12x = 981,969.12 × 389,282.40
  4. Step 4: Simplify right side
    711,573.12x = 382,263,295,759.49
  5. Step 5: Solve for x
    x = 382,263,295,759.49/711,573.12
  6. Step 6: Final answer
    x = 537,208.74

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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.