Home / 2,817.90-4,225.64-869.67

Finding the Fourth Proportional to 2,817.90, 4,225.64 and 869.67

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Solution

The fourth proportional to 2,817.90, 4,225.64 and 869.67 is: 1,304.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,817.90 : 4,225.64 = 869.67 : x
  2. Step 2: Convert to fraction form
    2,817.90/4,225.64 = 869.67/x
  3. Step 3: Cross multiply
    2,817.90x = 4,225.64 × 869.67
  4. Step 4: Simplify right side
    2,817.90x = 3,674,907.99
  5. Step 5: Solve for x
    x = 3,674,907.99/2,817.90
  6. Step 6: Final answer
    x = 1,304.13

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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.