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Finding the Fourth Proportional to 1,015.33, 1,402.01 and 684.85

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Solution

The fourth proportional to 1,015.33, 1,402.01 and 684.85 is: 945.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,015.33 : 1,402.01 = 684.85 : x
  2. Step 2: Convert to fraction form
    1,015.33/1,402.01 = 684.85/x
  3. Step 3: Cross multiply
    1,015.33x = 1,402.01 × 684.85
  4. Step 4: Simplify right side
    1,015.33x = 960,166.55
  5. Step 5: Solve for x
    x = 960,166.55/1,015.33
  6. Step 6: Final answer
    x = 945.67

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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.