Home / 1,430.19-2,143.92-455.66

Finding the Fourth Proportional to 1,430.19, 2,143.92 and 455.66

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Solution

The fourth proportional to 1,430.19, 2,143.92 and 455.66 is: 683.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,430.19 : 2,143.92 = 455.66 : x
  2. Step 2: Convert to fraction form
    1,430.19/2,143.92 = 455.66/x
  3. Step 3: Cross multiply
    1,430.19x = 2,143.92 × 455.66
  4. Step 4: Simplify right side
    1,430.19x = 976,898.59
  5. Step 5: Solve for x
    x = 976,898.59/1,430.19
  6. Step 6: Final answer
    x = 683.06

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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.