Home / 1,420.29-2,130.59-495.68

Finding the Fourth Proportional to 1,420.29, 2,130.59 and 495.68

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Solution

The fourth proportional to 1,420.29, 2,130.59 and 495.68 is: 743.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420.29 : 2,130.59 = 495.68 : x
  2. Step 2: Convert to fraction form
    1,420.29/2,130.59 = 495.68/x
  3. Step 3: Cross multiply
    1,420.29x = 2,130.59 × 495.68
  4. Step 4: Simplify right side
    1,420.29x = 1,056,081.44
  5. Step 5: Solve for x
    x = 1,056,081.44/1,420.29
  6. Step 6: Final answer
    x = 743.57

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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.