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Finding the Fourth Proportional to 711,506.57, 981,878.73 and 389,216.57

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Solution

The fourth proportional to 711,506.57, 981,878.73 and 389,216.57 is: 537,118.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,506.57 : 981,878.73 = 389,216.57 : x
  2. Step 2: Convert to fraction form
    711,506.57/981,878.73 = 389,216.57/x
  3. Step 3: Cross multiply
    711,506.57x = 981,878.73 × 389,216.57
  4. Step 4: Simplify right side
    711,506.57x = 382,163,473,901.25
  5. Step 5: Solve for x
    x = 382,163,473,901.25/711,506.57
  6. Step 6: Final answer
    x = 537,118.69

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1.5x scale

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.