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Finding the Fourth Proportional to 711,368.52, 981,674.76 and 389,077.68

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Solution

The fourth proportional to 711,368.52, 981,674.76 and 389,077.68 is: 536,919.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,368.52 : 981,674.76 = 389,077.68 : x
  2. Step 2: Convert to fraction form
    711,368.52/981,674.76 = 389,077.68/x
  3. Step 3: Cross multiply
    711,368.52x = 981,674.76 × 389,077.68
  4. Step 4: Simplify right side
    711,368.52x = 381,947,738,135.36
  5. Step 5: Solve for x
    x = 381,947,738,135.36/711,368.52
  6. Step 6: Final answer
    x = 536,919.65

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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.