Home / 2,479.09-3,421.45-1,431.16

Finding the Fourth Proportional to 2,479.09, 3,421.45 and 1,431.16

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Solution

The fourth proportional to 2,479.09, 3,421.45 and 1,431.16 is: 1,975.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,479.09 : 3,421.45 = 1,431.16 : x
  2. Step 2: Convert to fraction form
    2,479.09/3,421.45 = 1,431.16/x
  3. Step 3: Cross multiply
    2,479.09x = 3,421.45 × 1,431.16
  4. Step 4: Simplify right side
    2,479.09x = 4,896,642.38
  5. Step 5: Solve for x
    x = 4,896,642.38/2,479.09
  6. Step 6: Final answer
    x = 1,975.18

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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.