Home / 1,430.28-2,145.39-456.37

Finding the Fourth Proportional to 1,430.28, 2,145.39 and 456.37

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Solution

The fourth proportional to 1,430.28, 2,145.39 and 456.37 is: 684.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,430.28 : 2,145.39 = 456.37 : x
  2. Step 2: Convert to fraction form
    1,430.28/2,145.39 = 456.37/x
  3. Step 3: Cross multiply
    1,430.28x = 2,145.39 × 456.37
  4. Step 4: Simplify right side
    1,430.28x = 979,080.91
  5. Step 5: Solve for x
    x = 979,080.91/1,430.28
  6. Step 6: Final answer
    x = 684.54

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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.