Home / 638,831.20-958,246.80-189,621.40

Finding the Fourth Proportional to 638,831.20, 958,246.80 and 189,621.40

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Solution

The fourth proportional to 638,831.20, 958,246.80 and 189,621.40 is: 284,432.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,831.20 : 958,246.80 = 189,621.40 : x
  2. Step 2: Convert to fraction form
    638,831.20/958,246.80 = 189,621.40/x
  3. Step 3: Cross multiply
    638,831.20x = 958,246.80 × 189,621.40
  4. Step 4: Simplify right side
    638,831.20x = 181,704,099,761.52
  5. Step 5: Solve for x
    x = 181,704,099,761.52/638,831.20
  6. Step 6: Final answer
    x = 284,432.10

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.