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Finding the Fourth Proportional to 716,049.29, 988,155.28 and 393,761.77

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Solution

The fourth proportional to 716,049.29, 988,155.28 and 393,761.77 is: 543,395.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,049.29 : 988,155.28 = 393,761.77 : x
  2. Step 2: Convert to fraction form
    716,049.29/988,155.28 = 393,761.77/x
  3. Step 3: Cross multiply
    716,049.29x = 988,155.28 × 393,761.77
  4. Step 4: Simplify right side
    716,049.29x = 389,097,770,109.46
  5. Step 5: Solve for x
    x = 389,097,770,109.46/716,049.29
  6. Step 6: Final answer
    x = 543,395.23

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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.