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Finding the Fourth Proportional to 1,393.14, 2,088.36 and 776.28

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Solution

The fourth proportional to 1,393.14, 2,088.36 and 776.28 is: 1,163.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,393.14 : 2,088.36 = 776.28 : x
  2. Step 2: Convert to fraction form
    1,393.14/2,088.36 = 776.28/x
  3. Step 3: Cross multiply
    1,393.14x = 2,088.36 × 776.28
  4. Step 4: Simplify right side
    1,393.14x = 1,621,152.10
  5. Step 5: Solve for x
    x = 1,621,152.10/1,393.14
  6. Step 6: Final answer
    x = 1,163.67

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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.