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Finding the Fourth Proportional to 318,626.06, 439,480.01 and 209,695.70

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Solution

The fourth proportional to 318,626.06, 439,480.01 and 209,695.70 is: 289,232.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,626.06 : 439,480.01 = 209,695.70 : x
  2. Step 2: Convert to fraction form
    318,626.06/439,480.01 = 209,695.70/x
  3. Step 3: Cross multiply
    318,626.06x = 439,480.01 × 209,695.70
  4. Step 4: Simplify right side
    318,626.06x = 92,157,069,955.90
  5. Step 5: Solve for x
    x = 92,157,069,955.90/318,626.06
  6. Step 6: Final answer
    x = 289,232.69

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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.