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Finding the Fourth Proportional to 45,812.60, 63,217 and 31,485

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Solution

The fourth proportional to 45,812.60, 63,217 and 31,485 is: 43,446.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,812.60 : 63,217 = 31,485 : x
  2. Step 2: Convert to fraction form
    45,812.60/63,217 = 31,485/x
  3. Step 3: Cross multiply
    45,812.60x = 63,217 × 31,485
  4. Step 4: Simplify right side
    45,812.60x = 1,990,387,245
  5. Step 5: Solve for x
    x = 1,990,387,245/45,812.60
  6. Step 6: Final answer
    x = 43,446.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.