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Finding the Third Proportional to 287,360 and 611,080

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Solution

The third proportional to 287,360 and 611,080 is: 1,299,480.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,360 : 611,080 = 611,080 : x
  2. Step 2: Convert to fraction form
    287,360/611,080 = 611,080/x
  3. Step 3: Cross multiply
    287,360x = 611,080 × 611,080
  4. Step 4: Simplify right side
    287,360x = 373,418,766,400
  5. Step 5: Solve for x
    x = 373,418,766,400/287,360
  6. Step 6: Final answer
    x = 1,299,480.67

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.