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Finding the Fourth Proportional to 703,620, 1,055,430 and 309,636

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Solution

The fourth proportional to 703,620, 1,055,430 and 309,636 is: 464,454

Step by Step Solution

  1. Step 1: Write the proportion equation
    703,620 : 1,055,430 = 309,636 : x
  2. Step 2: Convert to fraction form
    703,620/1,055,430 = 309,636/x
  3. Step 3: Cross multiply
    703,620x = 1,055,430 × 309,636
  4. Step 4: Simplify right side
    703,620x = 326,799,123,480
  5. Step 5: Solve for x
    x = 326,799,123,480/703,620
  6. Step 6: Final answer
    x = 464,454

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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.