Home / 2,312.07-3,190.65-1,317.15

Finding the Fourth Proportional to 2,312.07, 3,190.65 and 1,317.15

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Solution

The fourth proportional to 2,312.07, 3,190.65 and 1,317.15 is: 1,817.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,312.07 : 3,190.65 = 1,317.15 : x
  2. Step 2: Convert to fraction form
    2,312.07/3,190.65 = 1,317.15/x
  3. Step 3: Cross multiply
    2,312.07x = 3,190.65 × 1,317.15
  4. Step 4: Simplify right side
    2,312.07x = 4,202,564.65
  5. Step 5: Solve for x
    x = 4,202,564.65/2,312.07
  6. Step 6: Final answer
    x = 1,817.66

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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.