Home / 1,281.34-1,767.72-1,045.90

Finding the Fourth Proportional to 1,281.34, 1,767.72 and 1,045.90

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Solution

The fourth proportional to 1,281.34, 1,767.72 and 1,045.90 is: 1,442.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281.34 : 1,767.72 = 1,045.90 : x
  2. Step 2: Convert to fraction form
    1,281.34/1,767.72 = 1,045.90/x
  3. Step 3: Cross multiply
    1,281.34x = 1,767.72 × 1,045.90
  4. Step 4: Simplify right side
    1,281.34x = 1,848,858.35
  5. Step 5: Solve for x
    x = 1,848,858.35/1,281.34
  6. Step 6: Final answer
    x = 1,442.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.