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Finding the Fourth Proportional to 515,219.75, 772,640.06 and 178,173.89

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Solution

The fourth proportional to 515,219.75, 772,640.06 and 178,173.89 is: 267,195.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,219.75 : 772,640.06 = 178,173.89 : x
  2. Step 2: Convert to fraction form
    515,219.75/772,640.06 = 178,173.89/x
  3. Step 3: Cross multiply
    515,219.75x = 772,640.06 × 178,173.89
  4. Step 4: Simplify right side
    515,219.75x = 137,664,281,642.27
  5. Step 5: Solve for x
    x = 137,664,281,642.27/515,219.75
  6. Step 6: Final answer
    x = 267,195.28

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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.