Home / 1,430.55-2,145.21-443.10

Finding the Fourth Proportional to 1,430.55, 2,145.21 and 443.10

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Solution

The fourth proportional to 1,430.55, 2,145.21 and 443.10 is: 664.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,430.55 : 2,145.21 = 443.10 : x
  2. Step 2: Convert to fraction form
    1,430.55/2,145.21 = 443.10/x
  3. Step 3: Cross multiply
    1,430.55x = 2,145.21 × 443.10
  4. Step 4: Simplify right side
    1,430.55x = 950,542.55
  5. Step 5: Solve for x
    x = 950,542.55/1,430.55
  6. Step 6: Final answer
    x = 664.46

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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.