Home / 1,420.18-2,129.76-495.50

Finding the Fourth Proportional to 1,420.18, 2,129.76 and 495.50

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Solution

The fourth proportional to 1,420.18, 2,129.76 and 495.50 is: 743.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420.18 : 2,129.76 = 495.50 : x
  2. Step 2: Convert to fraction form
    1,420.18/2,129.76 = 495.50/x
  3. Step 3: Cross multiply
    1,420.18x = 2,129.76 × 495.50
  4. Step 4: Simplify right side
    1,420.18x = 1,055,296.08
  5. Step 5: Solve for x
    x = 1,055,296.08/1,420.18
  6. Step 6: Final answer
    x = 743.07

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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.