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Finding the Third Proportional to 1,403,860.78 and 2,156,502.38

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Solution

The third proportional to 1,403,860.78 and 2,156,502.38 is: 3,312,652.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,403,860.78 : 2,156,502.38 = 2,156,502.38 : x
  2. Step 2: Convert to fraction form
    1,403,860.78/2,156,502.38 = 2,156,502.38/x
  3. Step 3: Cross multiply
    1,403,860.78x = 2,156,502.38 × 2,156,502.38
  4. Step 4: Simplify right side
    1,403,860.78x = 4,650,502,493,380.64
  5. Step 5: Solve for x
    x = 4,650,502,493,380.64/1,403,860.78
  6. Step 6: Final answer
    x = 3,312,652.19

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.