Home / 639,400.60-881,831.10-384,704.20

Finding the Fourth Proportional to 639,400.60, 881,831.10 and 384,704.20

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Solution

The fourth proportional to 639,400.60, 881,831.10 and 384,704.20 is: 530,565.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,400.60 : 881,831.10 = 384,704.20 : x
  2. Step 2: Convert to fraction form
    639,400.60/881,831.10 = 384,704.20/x
  3. Step 3: Cross multiply
    639,400.60x = 881,831.10 × 384,704.20
  4. Step 4: Simplify right side
    639,400.60x = 339,244,127,860.62
  5. Step 5: Solve for x
    x = 339,244,127,860.62/639,400.60
  6. Step 6: Final answer
    x = 530,565.86

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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.