Home / 612,930,731.20-919,396,096.80-407,793,630.40

Finding the Fourth Proportional to 612,930,731.20, 919,396,096.80 and 407,793,630.40

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Solution

The fourth proportional to 612,930,731.20, 919,396,096.80 and 407,793,630.40 is: 611,690,445.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,930,731.20 : 919,396,096.80 = 407,793,630.40 : x
  2. Step 2: Convert to fraction form
    612,930,731.20/919,396,096.80 = 407,793,630.40/x
  3. Step 3: Cross multiply
    612,930,731.20x = 919,396,096.80 × 407,793,630.40
  4. Step 4: Simplify right side
    612,930,731.20x = 374,923,872,089,661,760
  5. Step 5: Solve for x
    x = 374,923,872,089,661,760/612,930,731.20
  6. Step 6: Final answer
    x = 611,690,445.60

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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.