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Finding the Third Proportional to 1,391,688.56 and 2,154,874.50

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Solution

The third proportional to 1,391,688.56 and 2,154,874.50 is: 3,336,582.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,688.56 : 2,154,874.50 = 2,154,874.50 : x
  2. Step 2: Convert to fraction form
    1,391,688.56/2,154,874.50 = 2,154,874.50/x
  3. Step 3: Cross multiply
    1,391,688.56x = 2,154,874.50 × 2,154,874.50
  4. Step 4: Simplify right side
    1,391,688.56x = 4,643,484,110,750.25
  5. Step 5: Solve for x
    x = 4,643,484,110,750.25/1,391,688.56
  6. Step 6: Final answer
    x = 3,336,582.79

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.