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Finding the Fourth Proportional to 711,398.45, 981,737.48 and 389,101.66

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Solution

The fourth proportional to 711,398.45, 981,737.48 and 389,101.66 is: 536,964.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,398.45 : 981,737.48 = 389,101.66 : x
  2. Step 2: Convert to fraction form
    711,398.45/981,737.48 = 389,101.66/x
  3. Step 3: Cross multiply
    711,398.45x = 981,737.48 × 389,101.66
  4. Step 4: Simplify right side
    711,398.45x = 381,995,681,670.63
  5. Step 5: Solve for x
    x = 381,995,681,670.63/711,398.45
  6. Step 6: Final answer
    x = 536,964.45

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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.