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Finding the Fourth Proportional to 716,803.60, 989,181.47 and 394,506.78

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Solution

The fourth proportional to 716,803.60, 989,181.47 and 394,506.78 is: 544,415.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,803.60 : 989,181.47 = 394,506.78 : x
  2. Step 2: Convert to fraction form
    716,803.60/989,181.47 = 394,506.78/x
  3. Step 3: Cross multiply
    716,803.60x = 989,181.47 × 394,506.78
  4. Step 4: Simplify right side
    716,803.60x = 390,238,794,405.18
  5. Step 5: Solve for x
    x = 390,238,794,405.18/716,803.60
  6. Step 6: Final answer
    x = 544,415.23

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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.