Home / 1,938.32-2,681.92-1,690.15

Finding the Fourth Proportional to 1,938.32, 2,681.92 and 1,690.15

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Solution

The fourth proportional to 1,938.32, 2,681.92 and 1,690.15 is: 2,338.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,938.32 : 2,681.92 = 1,690.15 : x
  2. Step 2: Convert to fraction form
    1,938.32/2,681.92 = 1,690.15/x
  3. Step 3: Cross multiply
    1,938.32x = 2,681.92 × 1,690.15
  4. Step 4: Simplify right side
    1,938.32x = 4,532,838.64
  5. Step 5: Solve for x
    x = 4,532,838.64/1,938.32
  6. Step 6: Final answer
    x = 2,338.55

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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.