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Finding the Fourth Proportional to 642,604.10, 963,906.15 and 618,109.70

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Solution

The fourth proportional to 642,604.10, 963,906.15 and 618,109.70 is: 927,164.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,604.10 : 963,906.15 = 618,109.70 : x
  2. Step 2: Convert to fraction form
    642,604.10/963,906.15 = 618,109.70/x
  3. Step 3: Cross multiply
    642,604.10x = 963,906.15 × 618,109.70
  4. Step 4: Simplify right side
    642,604.10x = 595,799,741,204.66
  5. Step 5: Solve for x
    x = 595,799,741,204.66/642,604.10
  6. Step 6: Final answer
    x = 927,164.55

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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.