Home / 711,404.60-981,731.18-389,120.98

Finding the Fourth Proportional to 711,404.60, 981,731.18 and 389,120.98

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Solution

The fourth proportional to 711,404.60, 981,731.18 and 389,120.98 is: 536,983.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,404.60 : 981,731.18 = 389,120.98 : x
  2. Step 2: Convert to fraction form
    711,404.60/981,731.18 = 389,120.98/x
  3. Step 3: Cross multiply
    711,404.60x = 981,731.18 × 389,120.98
  4. Step 4: Simplify right side
    711,404.60x = 382,012,198,858.16
  5. Step 5: Solve for x
    x = 382,012,198,858.16/711,404.60
  6. Step 6: Final answer
    x = 536,983.03

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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.