Home / 1,421.54-2,130.99-1,304.75

Finding the Fourth Proportional to 1,421.54, 2,130.99 and 1,304.75

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Solution

The fourth proportional to 1,421.54, 2,130.99 and 1,304.75 is: 1,955.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.54 : 2,130.99 = 1,304.75 : x
  2. Step 2: Convert to fraction form
    1,421.54/2,130.99 = 1,304.75/x
  3. Step 3: Cross multiply
    1,421.54x = 2,130.99 × 1,304.75
  4. Step 4: Simplify right side
    1,421.54x = 2,780,409.20
  5. Step 5: Solve for x
    x = 2,780,409.20/1,421.54
  6. Step 6: Final answer
    x = 1,955.91

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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.