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Finding the Third Proportional to 286,789 and 420,040

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Solution

The third proportional to 286,789 and 420,040 is: 615,203.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,789 : 420,040 = 420,040 : x
  2. Step 2: Convert to fraction form
    286,789/420,040 = 420,040/x
  3. Step 3: Cross multiply
    286,789x = 420,040 × 420,040
  4. Step 4: Simplify right side
    286,789x = 176,433,601,600
  5. Step 5: Solve for x
    x = 176,433,601,600/286,789
  6. Step 6: Final answer
    x = 615,203.52

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.