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Finding the Fourth Proportional to 515,679.21, 711,626.18 and 286,223.04

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Solution

The fourth proportional to 515,679.21, 711,626.18 and 286,223.04 is: 394,981.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,679.21 : 711,626.18 = 286,223.04 : x
  2. Step 2: Convert to fraction form
    515,679.21/711,626.18 = 286,223.04/x
  3. Step 3: Cross multiply
    515,679.21x = 711,626.18 × 286,223.04
  4. Step 4: Simplify right side
    515,679.21x = 203,683,807,152.07
  5. Step 5: Solve for x
    x = 203,683,807,152.07/515,679.21
  6. Step 6: Final answer
    x = 394,981.61

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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.