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Finding the Fourth Proportional to 711,482.60, 981,833.09 and 389,189.88

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Solution

The fourth proportional to 711,482.60, 981,833.09 and 389,189.88 is: 537,074.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,482.60 : 981,833.09 = 389,189.88 : x
  2. Step 2: Convert to fraction form
    711,482.60/981,833.09 = 389,189.88/x
  3. Step 3: Cross multiply
    711,482.60x = 981,833.09 × 389,189.88
  4. Step 4: Simplify right side
    711,482.60x = 382,119,500,531.18
  5. Step 5: Solve for x
    x = 382,119,500,531.18/711,482.60
  6. Step 6: Final answer
    x = 537,074.97

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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.