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Finding the Fourth Proportional to 315,986.74, 436,068.57 and 188,638.54

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Solution

The fourth proportional to 315,986.74, 436,068.57 and 188,638.54 is: 260,325.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,986.74 : 436,068.57 = 188,638.54 : x
  2. Step 2: Convert to fraction form
    315,986.74/436,068.57 = 188,638.54/x
  3. Step 3: Cross multiply
    315,986.74x = 436,068.57 × 188,638.54
  4. Step 4: Simplify right side
    315,986.74x = 82,259,338,384.69
  5. Step 5: Solve for x
    x = 82,259,338,384.69/315,986.74
  6. Step 6: Final answer
    x = 260,325.29

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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.