Home / 1,420.37-2,130.76-495.70

Finding the Fourth Proportional to 1,420.37, 2,130.76 and 495.70

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Solution

The fourth proportional to 1,420.37, 2,130.76 and 495.70 is: 743.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420.37 : 2,130.76 = 495.70 : x
  2. Step 2: Convert to fraction form
    1,420.37/2,130.76 = 495.70/x
  3. Step 3: Cross multiply
    1,420.37x = 2,130.76 × 495.70
  4. Step 4: Simplify right side
    1,420.37x = 1,056,222.22
  5. Step 5: Solve for x
    x = 1,056,222.22/1,420.37
  6. Step 6: Final answer
    x = 743.63

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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.