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Finding the Fourth Proportional to 643,711.66, 888,116.59 and 371,743.63

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Solution

The fourth proportional to 643,711.66, 888,116.59 and 371,743.63 is: 512,887.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,711.66 : 888,116.59 = 371,743.63 : x
  2. Step 2: Convert to fraction form
    643,711.66/888,116.59 = 371,743.63/x
  3. Step 3: Cross multiply
    643,711.66x = 888,116.59 × 371,743.63
  4. Step 4: Simplify right side
    643,711.66x = 330,151,685,029.82
  5. Step 5: Solve for x
    x = 330,151,685,029.82/643,711.66
  6. Step 6: Final answer
    x = 512,887.53

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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.