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Finding the Fourth Proportional to 415,997.45, 623,998 and 131,689.39

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Solution

The fourth proportional to 415,997.45, 623,998 and 131,689.39 is: 197,534.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,997.45 : 623,998 = 131,689.39 : x
  2. Step 2: Convert to fraction form
    415,997.45/623,998 = 131,689.39/x
  3. Step 3: Cross multiply
    415,997.45x = 623,998 × 131,689.39
  4. Step 4: Simplify right side
    415,997.45x = 82,173,915,981.22
  5. Step 5: Solve for x
    x = 82,173,915,981.22/415,997.45
  6. Step 6: Final answer
    x = 197,534.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.