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Finding the Fourth Proportional to 316,811.25, 437,131.49 and 187,790.40

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Solution

The fourth proportional to 316,811.25, 437,131.49 and 187,790.40 is: 259,110.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,811.25 : 437,131.49 = 187,790.40 : x
  2. Step 2: Convert to fraction form
    316,811.25/437,131.49 = 187,790.40/x
  3. Step 3: Cross multiply
    316,811.25x = 437,131.49 × 187,790.40
  4. Step 4: Simplify right side
    316,811.25x = 82,089,096,420.74
  5. Step 5: Solve for x
    x = 82,089,096,420.74/316,811.25
  6. Step 6: Final answer
    x = 259,110.42

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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.