Home / 2,647.39-3,645.69-2,478.35

Finding the Fourth Proportional to 2,647.39, 3,645.69 and 2,478.35

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Solution

The fourth proportional to 2,647.39, 3,645.69 and 2,478.35 is: 3,412.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,647.39 : 3,645.69 = 2,478.35 : x
  2. Step 2: Convert to fraction form
    2,647.39/3,645.69 = 2,478.35/x
  3. Step 3: Cross multiply
    2,647.39x = 3,645.69 × 2,478.35
  4. Step 4: Simplify right side
    2,647.39x = 9,035,295.81
  5. Step 5: Solve for x
    x = 9,035,295.81/2,647.39
  6. Step 6: Final answer
    x = 3,412.91

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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.