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Finding the Fourth Proportional to 716,139.75, 988,297.70 and 393,874.23

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Solution

The fourth proportional to 716,139.75, 988,297.70 and 393,874.23 is: 543,560.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,139.75 : 988,297.70 = 393,874.23 : x
  2. Step 2: Convert to fraction form
    716,139.75/988,297.70 = 393,874.23/x
  3. Step 3: Cross multiply
    716,139.75x = 988,297.70 × 393,874.23
  4. Step 4: Simplify right side
    716,139.75x = 389,264,993,628.90
  5. Step 5: Solve for x
    x = 389,264,993,628.90/716,139.75
  6. Step 6: Final answer
    x = 543,560.10

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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.