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Finding the Fourth Proportional to 711,348.60, 981,648.64 and 389,051.62

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Solution

The fourth proportional to 711,348.60, 981,648.64 and 389,051.62 is: 536,884.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,348.60 : 981,648.64 = 389,051.62 : x
  2. Step 2: Convert to fraction form
    711,348.60/981,648.64 = 389,051.62/x
  3. Step 3: Cross multiply
    711,348.60x = 981,648.64 × 389,051.62
  4. Step 4: Simplify right side
    711,348.60x = 381,911,993,662.80
  5. Step 5: Solve for x
    x = 381,911,993,662.80/711,348.60
  6. Step 6: Final answer
    x = 536,884.44

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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.