Home / 1,430.36-2,145.49-456.49

Finding the Fourth Proportional to 1,430.36, 2,145.49 and 456.49

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Solution

The fourth proportional to 1,430.36, 2,145.49 and 456.49 is: 684.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,430.36 : 2,145.49 = 456.49 : x
  2. Step 2: Convert to fraction form
    1,430.36/2,145.49 = 456.49/x
  3. Step 3: Cross multiply
    1,430.36x = 2,145.49 × 456.49
  4. Step 4: Simplify right side
    1,430.36x = 979,384.20
  5. Step 5: Solve for x
    x = 979,384.20/1,430.36
  6. Step 6: Final answer
    x = 684.71

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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.