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Finding the Fourth Proportional to 315,985.83, 436,065.62 and 188,672.55

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Solution

The fourth proportional to 315,985.83, 436,065.62 and 188,672.55 is: 260,371.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,985.83 : 436,065.62 = 188,672.55 : x
  2. Step 2: Convert to fraction form
    315,985.83/436,065.62 = 188,672.55/x
  3. Step 3: Cross multiply
    315,985.83x = 436,065.62 × 188,672.55
  4. Step 4: Simplify right side
    315,985.83x = 82,273,612,492.73
  5. Step 5: Solve for x
    x = 82,273,612,492.73/315,985.83
  6. Step 6: Final answer
    x = 260,371.21

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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.