Home / 3,128.31-4,317.93-1,870.22

Finding the Fourth Proportional to 3,128.31, 4,317.93 and 1,870.22

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Solution

The fourth proportional to 3,128.31, 4,317.93 and 1,870.22 is: 2,581.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.31 : 4,317.93 = 1,870.22 : x
  2. Step 2: Convert to fraction form
    3,128.31/4,317.93 = 1,870.22/x
  3. Step 3: Cross multiply
    3,128.31x = 4,317.93 × 1,870.22
  4. Step 4: Simplify right side
    3,128.31x = 8,075,489.84
  5. Step 5: Solve for x
    x = 8,075,489.84/3,128.31
  6. Step 6: Final answer
    x = 2,581.42

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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.