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Finding the Fourth Proportional to 716,857.40, 989,255.38 and 394,560.56

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Solution

The fourth proportional to 716,857.40, 989,255.38 and 394,560.56 is: 544,489.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,857.40 : 989,255.38 = 394,560.56 : x
  2. Step 2: Convert to fraction form
    716,857.40/989,255.38 = 394,560.56/x
  3. Step 3: Cross multiply
    716,857.40x = 989,255.38 × 394,560.56
  4. Step 4: Simplify right side
    716,857.40x = 390,321,156,715.81
  5. Step 5: Solve for x
    x = 390,321,156,715.81/716,857.40
  6. Step 6: Final answer
    x = 544,489.26

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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.