Home / 2,680.16-3,698.40-1,561.40

Finding the Fourth Proportional to 2,680.16, 3,698.40 and 1,561.40

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Solution

The fourth proportional to 2,680.16, 3,698.40 and 1,561.40 is: 2,154.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,680.16 : 3,698.40 = 1,561.40 : x
  2. Step 2: Convert to fraction form
    2,680.16/3,698.40 = 1,561.40/x
  3. Step 3: Cross multiply
    2,680.16x = 3,698.40 × 1,561.40
  4. Step 4: Simplify right side
    2,680.16x = 5,774,681.76
  5. Step 5: Solve for x
    x = 5,774,681.76/2,680.16
  6. Step 6: Final answer
    x = 2,154.60

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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.