Home / 1,529.10-2,109.90-865.81

Finding the Fourth Proportional to 1,529.10, 2,109.90 and 865.81

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Solution

The fourth proportional to 1,529.10, 2,109.90 and 865.81 is: 1,194.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,529.10 : 2,109.90 = 865.81 : x
  2. Step 2: Convert to fraction form
    1,529.10/2,109.90 = 865.81/x
  3. Step 3: Cross multiply
    1,529.10x = 2,109.90 × 865.81
  4. Step 4: Simplify right side
    1,529.10x = 1,826,767.24
  5. Step 5: Solve for x
    x = 1,826,767.24/1,529.10
  6. Step 6: Final answer
    x = 1,194.67

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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.