Home / 1,555.21-2,331.99-459.42

Finding the Fourth Proportional to 1,555.21, 2,331.99 and 459.42

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Solution

The fourth proportional to 1,555.21, 2,331.99 and 459.42 is: 688.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.21 : 2,331.99 = 459.42 : x
  2. Step 2: Convert to fraction form
    1,555.21/2,331.99 = 459.42/x
  3. Step 3: Cross multiply
    1,555.21x = 2,331.99 × 459.42
  4. Step 4: Simplify right side
    1,555.21x = 1,071,362.85
  5. Step 5: Solve for x
    x = 1,071,362.85/1,555.21
  6. Step 6: Final answer
    x = 688.89

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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.