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Finding the Third Proportional to 721,428 and 1,551,390

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Solution

The third proportional to 721,428 and 1,551,390 is: 3,336,176.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,428 : 1,551,390 = 1,551,390 : x
  2. Step 2: Convert to fraction form
    721,428/1,551,390 = 1,551,390/x
  3. Step 3: Cross multiply
    721,428x = 1,551,390 × 1,551,390
  4. Step 4: Simplify right side
    721,428x = 2,406,810,932,100
  5. Step 5: Solve for x
    x = 2,406,810,932,100/721,428
  6. Step 6: Final answer
    x = 3,336,176.21

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.