Home / 1,430.37-2,145.09-456.24

Finding the Fourth Proportional to 1,430.37, 2,145.09 and 456.24

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Solution

The fourth proportional to 1,430.37, 2,145.09 and 456.24 is: 684.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,430.37 : 2,145.09 = 456.24 : x
  2. Step 2: Convert to fraction form
    1,430.37/2,145.09 = 456.24/x
  3. Step 3: Cross multiply
    1,430.37x = 2,145.09 × 456.24
  4. Step 4: Simplify right side
    1,430.37x = 978,675.86
  5. Step 5: Solve for x
    x = 978,675.86/1,430.37
  6. Step 6: Final answer
    x = 684.21

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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.