Home / 1,421.07-2,131.59-555.38

Finding the Fourth Proportional to 1,421.07, 2,131.59 and 555.38

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Solution

The fourth proportional to 1,421.07, 2,131.59 and 555.38 is: 833.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.07 : 2,131.59 = 555.38 : x
  2. Step 2: Convert to fraction form
    1,421.07/2,131.59 = 555.38/x
  3. Step 3: Cross multiply
    1,421.07x = 2,131.59 × 555.38
  4. Step 4: Simplify right side
    1,421.07x = 1,183,831.80
  5. Step 5: Solve for x
    x = 1,183,831.80/1,421.07
  6. Step 6: Final answer
    x = 833.06

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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.