Home / 1,317.09-1,817.58-757.67

Finding the Fourth Proportional to 1,317.09, 1,817.58 and 757.67

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Solution

The fourth proportional to 1,317.09, 1,817.58 and 757.67 is: 1,045.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.09 : 1,817.58 = 757.67 : x
  2. Step 2: Convert to fraction form
    1,317.09/1,817.58 = 757.67/x
  3. Step 3: Cross multiply
    1,317.09x = 1,817.58 × 757.67
  4. Step 4: Simplify right side
    1,317.09x = 1,377,125.84
  5. Step 5: Solve for x
    x = 1,377,125.84/1,317.09
  6. Step 6: Final answer
    x = 1,045.58

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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.