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Finding the Fourth Proportional to 315,986.33, 436,066.32 and 188,673.05

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Solution

The fourth proportional to 315,986.33, 436,066.32 and 188,673.05 is: 260,371.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,986.33 : 436,066.32 = 188,673.05 : x
  2. Step 2: Convert to fraction form
    315,986.33/436,066.32 = 188,673.05/x
  3. Step 3: Cross multiply
    315,986.33x = 436,066.32 × 188,673.05
  4. Step 4: Simplify right side
    315,986.33x = 82,273,960,416.34
  5. Step 5: Solve for x
    x = 82,273,960,416.34/315,986.33
  6. Step 6: Final answer
    x = 260,371.90

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1.5x scale

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.