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Finding the Fourth Proportional to 1,265.38, 1,898.05 and 443.67

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Solution

The fourth proportional to 1,265.38, 1,898.05 and 443.67 is: 665.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,265.38 : 1,898.05 = 443.67 : x
  2. Step 2: Convert to fraction form
    1,265.38/1,898.05 = 443.67/x
  3. Step 3: Cross multiply
    1,265.38x = 1,898.05 × 443.67
  4. Step 4: Simplify right side
    1,265.38x = 842,107.84
  5. Step 5: Solve for x
    x = 842,107.84/1,265.38
  6. Step 6: Final answer
    x = 665.50

Related Problems

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Half scale
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Double scale
Find fourth proportional to 1,266.38, 1,899.55 and 444.67
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1.5x scale

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.