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Finding the Fourth Proportional to 1,338.98, 1,848.12 and 841.64

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Solution

The fourth proportional to 1,338.98, 1,848.12 and 841.64 is: 1,161.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,338.98 : 1,848.12 = 841.64 : x
  2. Step 2: Convert to fraction form
    1,338.98/1,848.12 = 841.64/x
  3. Step 3: Cross multiply
    1,338.98x = 1,848.12 × 841.64
  4. Step 4: Simplify right side
    1,338.98x = 1,555,451.72
  5. Step 5: Solve for x
    x = 1,555,451.72/1,338.98
  6. Step 6: Final answer
    x = 1,161.67

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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.