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Finding the Fourth Proportional to 1,384.42, 2,076.62 and 410.45

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Solution

The fourth proportional to 1,384.42, 2,076.62 and 410.45 is: 615.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,384.42 : 2,076.62 = 410.45 : x
  2. Step 2: Convert to fraction form
    1,384.42/2,076.62 = 410.45/x
  3. Step 3: Cross multiply
    1,384.42x = 2,076.62 × 410.45
  4. Step 4: Simplify right side
    1,384.42x = 852,348.68
  5. Step 5: Solve for x
    x = 852,348.68/1,384.42
  6. Step 6: Final answer
    x = 615.67

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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.