Home / 3,130.10-4,315.62-2,290.12

Finding the Fourth Proportional to 3,130.10, 4,315.62 and 2,290.12

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Solution

The fourth proportional to 3,130.10, 4,315.62 and 2,290.12 is: 3,157.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,130.10 : 4,315.62 = 2,290.12 : x
  2. Step 2: Convert to fraction form
    3,130.10/4,315.62 = 2,290.12/x
  3. Step 3: Cross multiply
    3,130.10x = 4,315.62 × 2,290.12
  4. Step 4: Simplify right side
    3,130.10x = 9,883,287.67
  5. Step 5: Solve for x
    x = 9,883,287.67/3,130.10
  6. Step 6: Final answer
    x = 3,157.50

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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.