Home / 612,930,608.20-919,395,912.30-407,793,507.40

Finding the Fourth Proportional to 612,930,608.20, 919,395,912.30 and 407,793,507.40

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Solution

The fourth proportional to 612,930,608.20, 919,395,912.30 and 407,793,507.40 is: 611,690,261.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,930,608.20 : 919,395,912.30 = 407,793,507.40 : x
  2. Step 2: Convert to fraction form
    612,930,608.20/919,395,912.30 = 407,793,507.40/x
  3. Step 3: Cross multiply
    612,930,608.20x = 919,395,912.30 × 407,793,507.40
  4. Step 4: Simplify right side
    612,930,608.20x = 374,923,683,766,039,744
  5. Step 5: Solve for x
    x = 374,923,683,766,039,744/612,930,608.20
  6. Step 6: Final answer
    x = 611,690,261.10

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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.