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Finding the Fourth Proportional to 412,322.40, 618,483.60 and 398,544.30

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Solution

The fourth proportional to 412,322.40, 618,483.60 and 398,544.30 is: 597,816.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,322.40 : 618,483.60 = 398,544.30 : x
  2. Step 2: Convert to fraction form
    412,322.40/618,483.60 = 398,544.30/x
  3. Step 3: Cross multiply
    412,322.40x = 618,483.60 × 398,544.30
  4. Step 4: Simplify right side
    412,322.40x = 246,493,113,423.48
  5. Step 5: Solve for x
    x = 246,493,113,423.48/412,322.40
  6. Step 6: Final answer
    x = 597,816.45

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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.