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Finding the Fourth Proportional to 1,330.85, 1,996.74 and 715.01

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Solution

The fourth proportional to 1,330.85, 1,996.74 and 715.01 is: 1,072.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330.85 : 1,996.74 = 715.01 : x
  2. Step 2: Convert to fraction form
    1,330.85/1,996.74 = 715.01/x
  3. Step 3: Cross multiply
    1,330.85x = 1,996.74 × 715.01
  4. Step 4: Simplify right side
    1,330.85x = 1,427,679.08
  5. Step 5: Solve for x
    x = 1,427,679.08/1,330.85
  6. Step 6: Final answer
    x = 1,072.76

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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.