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Finding the Fourth Proportional to 618,921,092.40, 928,381,638.60 and 618,921,092.40

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Solution

The fourth proportional to 618,921,092.40, 928,381,638.60 and 618,921,092.40 is: 928,381,638.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,921,092.40 : 928,381,638.60 = 618,921,092.40 : x
  2. Step 2: Convert to fraction form
    618,921,092.40/928,381,638.60 = 618,921,092.40/x
  3. Step 3: Cross multiply
    618,921,092.40x = 928,381,638.60 × 618,921,092.40
  4. Step 4: Simplify right side
    618,921,092.40x = 574,594,977,926,414,016
  5. Step 5: Solve for x
    x = 574,594,977,926,414,016/618,921,092.40
  6. Step 6: Final answer
    x = 928,381,638.60

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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.