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Finding the Third Proportional to 156,915 and 342,989

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Solution

The third proportional to 156,915 and 342,989 is: 749,714.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,915 : 342,989 = 342,989 : x
  2. Step 2: Convert to fraction form
    156,915/342,989 = 342,989/x
  3. Step 3: Cross multiply
    156,915x = 342,989 × 342,989
  4. Step 4: Simplify right side
    156,915x = 117,641,454,121
  5. Step 5: Solve for x
    x = 117,641,454,121/156,915
  6. Step 6: Final answer
    x = 749,714.52

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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.