Home / 1,281.01-1,921.89-459.26

Finding the Fourth Proportional to 1,281.01, 1,921.89 and 459.26

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Solution

The fourth proportional to 1,281.01, 1,921.89 and 459.26 is: 689.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281.01 : 1,921.89 = 459.26 : x
  2. Step 2: Convert to fraction form
    1,281.01/1,921.89 = 459.26/x
  3. Step 3: Cross multiply
    1,281.01x = 1,921.89 × 459.26
  4. Step 4: Simplify right side
    1,281.01x = 882,652.01
  5. Step 5: Solve for x
    x = 882,652.01/1,281.01
  6. Step 6: Final answer
    x = 689.03

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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.