Home / 1,281.18-1,921.80-1,026.30

Finding the Fourth Proportional to 1,281.18, 1,921.80 and 1,026.30

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Solution

The fourth proportional to 1,281.18, 1,921.80 and 1,026.30 is: 1,539.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281.18 : 1,921.80 = 1,026.30 : x
  2. Step 2: Convert to fraction form
    1,281.18/1,921.80 = 1,026.30/x
  3. Step 3: Cross multiply
    1,281.18x = 1,921.80 × 1,026.30
  4. Step 4: Simplify right side
    1,281.18x = 1,972,343.34
  5. Step 5: Solve for x
    x = 1,972,343.34/1,281.18
  6. Step 6: Final answer
    x = 1,539.47

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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.