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Finding the Fourth Proportional to 711,574.62, 981,971.19 and 389,283.90

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Solution

The fourth proportional to 711,574.62, 981,971.19 and 389,283.90 is: 537,210.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,574.62 : 981,971.19 = 389,283.90 : x
  2. Step 2: Convert to fraction form
    711,574.62/981,971.19 = 389,283.90/x
  3. Step 3: Cross multiply
    711,574.62x = 981,971.19 × 389,283.90
  4. Step 4: Simplify right side
    711,574.62x = 382,265,574,530.84
  5. Step 5: Solve for x
    x = 382,265,574,530.84/711,574.62
  6. Step 6: Final answer
    x = 537,210.81

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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.