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Finding the Fourth Proportional to 1,515.68, 2,091.66 and 894.68

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Solution

The fourth proportional to 1,515.68, 2,091.66 and 894.68 is: 1,234.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.68 : 2,091.66 = 894.68 : x
  2. Step 2: Convert to fraction form
    1,515.68/2,091.66 = 894.68/x
  3. Step 3: Cross multiply
    1,515.68x = 2,091.66 × 894.68
  4. Step 4: Simplify right side
    1,515.68x = 1,871,366.37
  5. Step 5: Solve for x
    x = 1,871,366.37/1,515.68
  6. Step 6: Final answer
    x = 1,234.67

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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.