Home / 1,954.50-2,931.76-493.78

Finding the Fourth Proportional to 1,954.50, 2,931.76 and 493.78

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Solution

The fourth proportional to 1,954.50, 2,931.76 and 493.78 is: 740.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,954.50 : 2,931.76 = 493.78 : x
  2. Step 2: Convert to fraction form
    1,954.50/2,931.76 = 493.78/x
  3. Step 3: Cross multiply
    1,954.50x = 2,931.76 × 493.78
  4. Step 4: Simplify right side
    1,954.50x = 1,447,644.45
  5. Step 5: Solve for x
    x = 1,447,644.45/1,954.50
  6. Step 6: Final answer
    x = 740.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.