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Finding the Fourth Proportional to 318,441.51, 439,262.67 and 203,678.28

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Solution

The fourth proportional to 318,441.51, 439,262.67 and 203,678.28 is: 280,956.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,441.51 : 439,262.67 = 203,678.28 : x
  2. Step 2: Convert to fraction form
    318,441.51/439,262.67 = 203,678.28/x
  3. Step 3: Cross multiply
    318,441.51x = 439,262.67 × 203,678.28
  4. Step 4: Simplify right side
    318,441.51x = 89,468,265,093.81
  5. Step 5: Solve for x
    x = 89,468,265,093.81/318,441.51
  6. Step 6: Final answer
    x = 280,956.67

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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.