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Finding the Fourth Proportional to 3,120,194, 4,680,291 and 756,290

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Solution

The fourth proportional to 3,120,194, 4,680,291 and 756,290 is: 1,134,435

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120,194 : 4,680,291 = 756,290 : x
  2. Step 2: Convert to fraction form
    3,120,194/4,680,291 = 756,290/x
  3. Step 3: Cross multiply
    3,120,194x = 4,680,291 × 756,290
  4. Step 4: Simplify right side
    3,120,194x = 3,539,657,280,390
  5. Step 5: Solve for x
    x = 3,539,657,280,390/3,120,194
  6. Step 6: Final answer
    x = 1,134,435

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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.