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Finding the Fourth Proportional to 1,051.81, 1,577.72 and 282.31

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Solution

The fourth proportional to 1,051.81, 1,577.72 and 282.31 is: 423.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,051.81 : 1,577.72 = 282.31 : x
  2. Step 2: Convert to fraction form
    1,051.81/1,577.72 = 282.31/x
  3. Step 3: Cross multiply
    1,051.81x = 1,577.72 × 282.31
  4. Step 4: Simplify right side
    1,051.81x = 445,406.13
  5. Step 5: Solve for x
    x = 445,406.13/1,051.81
  6. Step 6: Final answer
    x = 423.47

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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.