Home / 1,430.48-2,145.87-1,121.77

Finding the Fourth Proportional to 1,430.48, 2,145.87 and 1,121.77

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Solution

The fourth proportional to 1,430.48, 2,145.87 and 1,121.77 is: 1,682.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,430.48 : 2,145.87 = 1,121.77 : x
  2. Step 2: Convert to fraction form
    1,430.48/2,145.87 = 1,121.77/x
  3. Step 3: Cross multiply
    1,430.48x = 2,145.87 × 1,121.77
  4. Step 4: Simplify right side
    1,430.48x = 2,407,172.59
  5. Step 5: Solve for x
    x = 2,407,172.59/1,430.48
  6. Step 6: Final answer
    x = 1,682.77

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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.