Home / 711,402.21-981,742.67-389,105.42

Finding the Fourth Proportional to 711,402.21, 981,742.67 and 389,105.42

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Solution

The fourth proportional to 711,402.21, 981,742.67 and 389,105.42 is: 536,969.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,402.21 : 981,742.67 = 389,105.42 : x
  2. Step 2: Convert to fraction form
    711,402.21/981,742.67 = 389,105.42/x
  3. Step 3: Cross multiply
    711,402.21x = 981,742.67 × 389,105.42
  4. Step 4: Simplify right side
    711,402.21x = 382,001,387,088.03
  5. Step 5: Solve for x
    x = 382,001,387,088.03/711,402.21
  6. Step 6: Final answer
    x = 536,969.64

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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.