Home / 840.03-1,260.47-378.15

Finding the Fourth Proportional to 840.03, 1,260.47 and 378.15

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Solution

The fourth proportional to 840.03, 1,260.47 and 378.15 is: 567.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    840.03 : 1,260.47 = 378.15 : x
  2. Step 2: Convert to fraction form
    840.03/1,260.47 = 378.15/x
  3. Step 3: Cross multiply
    840.03x = 1,260.47 × 378.15
  4. Step 4: Simplify right side
    840.03x = 476,644.84
  5. Step 5: Solve for x
    x = 476,644.84/840.03
  6. Step 6: Final answer
    x = 567.41

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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.