Home / 5,208.40-7,812.60-1,698.40

Finding the Fourth Proportional to 5,208.40, 7,812.60 and 1,698.40

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Solution

The fourth proportional to 5,208.40, 7,812.60 and 1,698.40 is: 2,547.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,208.40 : 7,812.60 = 1,698.40 : x
  2. Step 2: Convert to fraction form
    5,208.40/7,812.60 = 1,698.40/x
  3. Step 3: Cross multiply
    5,208.40x = 7,812.60 × 1,698.40
  4. Step 4: Simplify right side
    5,208.40x = 13,268,919.84
  5. Step 5: Solve for x
    x = 13,268,919.84/5,208.40
  6. Step 6: Final answer
    x = 2,547.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.