Home / 1,916.12-2,643.92-1,130.32

Finding the Fourth Proportional to 1,916.12, 2,643.92 and 1,130.32

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Solution

The fourth proportional to 1,916.12, 2,643.92 and 1,130.32 is: 1,559.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,916.12 : 2,643.92 = 1,130.32 : x
  2. Step 2: Convert to fraction form
    1,916.12/2,643.92 = 1,130.32/x
  3. Step 3: Cross multiply
    1,916.12x = 2,643.92 × 1,130.32
  4. Step 4: Simplify right side
    1,916.12x = 2,988,475.65
  5. Step 5: Solve for x
    x = 2,988,475.65/1,916.12
  6. Step 6: Final answer
    x = 1,559.65

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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.