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Finding the Third Proportional to 255,585 and 386,959.50

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Solution

The third proportional to 255,585 and 386,959.50 is: 585,862.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,585 : 386,959.50 = 386,959.50 : x
  2. Step 2: Convert to fraction form
    255,585/386,959.50 = 386,959.50/x
  3. Step 3: Cross multiply
    255,585x = 386,959.50 × 386,959.50
  4. Step 4: Simplify right side
    255,585x = 149,737,654,640.25
  5. Step 5: Solve for x
    x = 149,737,654,640.25/255,585
  6. Step 6: Final answer
    x = 585,862.45

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.