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Finding the Third Proportional to 135,248 and 289,258

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Solution

The third proportional to 135,248 and 289,258 is: 618,642.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,248 : 289,258 = 289,258 : x
  2. Step 2: Convert to fraction form
    135,248/289,258 = 289,258/x
  3. Step 3: Cross multiply
    135,248x = 289,258 × 289,258
  4. Step 4: Simplify right side
    135,248x = 83,670,190,564
  5. Step 5: Solve for x
    x = 83,670,190,564/135,248
  6. Step 6: Final answer
    x = 618,642.72

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.