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Finding the Third Proportional to 145,380 and 318,516

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Solution

The third proportional to 145,380 and 318,516 is: 697,843.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,380 : 318,516 = 318,516 : x
  2. Step 2: Convert to fraction form
    145,380/318,516 = 318,516/x
  3. Step 3: Cross multiply
    145,380x = 318,516 × 318,516
  4. Step 4: Simplify right side
    145,380x = 101,452,442,256
  5. Step 5: Solve for x
    x = 101,452,442,256/145,380
  6. Step 6: Final answer
    x = 697,843.19

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.