Home / 2,880.81-3,975.93-1,686.15

Finding the Fourth Proportional to 2,880.81, 3,975.93 and 1,686.15

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Solution

The fourth proportional to 2,880.81, 3,975.93 and 1,686.15 is: 2,327.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,880.81 : 3,975.93 = 1,686.15 : x
  2. Step 2: Convert to fraction form
    2,880.81/3,975.93 = 1,686.15/x
  3. Step 3: Cross multiply
    2,880.81x = 3,975.93 × 1,686.15
  4. Step 4: Simplify right side
    2,880.81x = 6,704,014.37
  5. Step 5: Solve for x
    x = 6,704,014.37/2,880.81
  6. Step 6: Final answer
    x = 2,327.13

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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.