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Finding the Fourth Proportional to 711,505.72, 981,901.32 and 389,208.44

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Solution

The fourth proportional to 711,505.72, 981,901.32 and 389,208.44 is: 537,120.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,505.72 : 981,901.32 = 389,208.44 : x
  2. Step 2: Convert to fraction form
    711,505.72/981,901.32 = 389,208.44/x
  3. Step 3: Cross multiply
    711,505.72x = 981,901.32 × 389,208.44
  4. Step 4: Simplify right side
    711,505.72x = 382,164,280,991.14
  5. Step 5: Solve for x
    x = 382,164,280,991.14/711,505.72
  6. Step 6: Final answer
    x = 537,120.46

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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.