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Finding the Fourth Proportional to 2,101.63, 3,150.30 and 869.71

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Solution

The fourth proportional to 2,101.63, 3,150.30 and 869.71 is: 1,303.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,101.63 : 3,150.30 = 869.71 : x
  2. Step 2: Convert to fraction form
    2,101.63/3,150.30 = 869.71/x
  3. Step 3: Cross multiply
    2,101.63x = 3,150.30 × 869.71
  4. Step 4: Simplify right side
    2,101.63x = 2,739,831.66
  5. Step 5: Solve for x
    x = 2,739,831.66/2,101.63
  6. Step 6: Final answer
    x = 1,303.67

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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.