Home / 985,381.20-1,478,120.40-512,989.20

Finding the Fourth Proportional to 985,381.20, 1,478,120.40 and 512,989.20

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Solution

The fourth proportional to 985,381.20, 1,478,120.40 and 512,989.20 is: 769,509.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    985,381.20 : 1,478,120.40 = 512,989.20 : x
  2. Step 2: Convert to fraction form
    985,381.20/1,478,120.40 = 512,989.20/x
  3. Step 3: Cross multiply
    985,381.20x = 1,478,120.40 × 512,989.20
  4. Step 4: Simplify right side
    985,381.20x = 758,259,801,499.68
  5. Step 5: Solve for x
    x = 758,259,801,499.68/985,381.20
  6. Step 6: Final answer
    x = 769,509.10

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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.