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Finding the Fourth Proportional to 705,850.53, 974,111.03 and 399,986.20

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Solution

The fourth proportional to 705,850.53, 974,111.03 and 399,986.20 is: 552,002.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    705,850.53 : 974,111.03 = 399,986.20 : x
  2. Step 2: Convert to fraction form
    705,850.53/974,111.03 = 399,986.20/x
  3. Step 3: Cross multiply
    705,850.53x = 974,111.03 × 399,986.20
  4. Step 4: Simplify right side
    705,850.53x = 389,630,969,267.79
  5. Step 5: Solve for x
    x = 389,630,969,267.79/705,850.53
  6. Step 6: Final answer
    x = 552,002.09

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Double scale
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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.