Home / 1,429.10-2,143.46-455.30

Finding the Fourth Proportional to 1,429.10, 2,143.46 and 455.30

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Solution

The fourth proportional to 1,429.10, 2,143.46 and 455.30 is: 682.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,429.10 : 2,143.46 = 455.30 : x
  2. Step 2: Convert to fraction form
    1,429.10/2,143.46 = 455.30/x
  3. Step 3: Cross multiply
    1,429.10x = 2,143.46 × 455.30
  4. Step 4: Simplify right side
    1,429.10x = 975,917.34
  5. Step 5: Solve for x
    x = 975,917.34/1,429.10
  6. Step 6: Final answer
    x = 682.89

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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.