Home / 711,308.61-981,599.18-389,015.28

Finding the Fourth Proportional to 711,308.61, 981,599.18 and 389,015.28

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Solution

The fourth proportional to 711,308.61, 981,599.18 and 389,015.28 is: 536,837.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,308.61 : 981,599.18 = 389,015.28 : x
  2. Step 2: Convert to fraction form
    711,308.61/981,599.18 = 389,015.28/x
  3. Step 3: Cross multiply
    711,308.61x = 981,599.18 × 389,015.28
  4. Step 4: Simplify right side
    711,308.61x = 381,857,077,910.39
  5. Step 5: Solve for x
    x = 381,857,077,910.39/711,308.61
  6. Step 6: Final answer
    x = 536,837.42

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1.5x scale

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.