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Finding the Fourth Proportional to 711,474.99, 981,859.12 and 389,185.46

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Solution

The fourth proportional to 711,474.99, 981,859.12 and 389,185.46 is: 537,088.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,474.99 : 981,859.12 = 389,185.46 : x
  2. Step 2: Convert to fraction form
    711,474.99/981,859.12 = 389,185.46/x
  3. Step 3: Cross multiply
    711,474.99x = 981,859.12 × 389,185.46
  4. Step 4: Simplify right side
    711,474.99x = 382,125,291,072.11
  5. Step 5: Solve for x
    x = 382,125,291,072.11/711,474.99
  6. Step 6: Final answer
    x = 537,088.86

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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.