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Finding the Fourth Proportional to 1,370.12, 2,055.86 and 548.63

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Solution

The fourth proportional to 1,370.12, 2,055.86 and 548.63 is: 823.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,370.12 : 2,055.86 = 548.63 : x
  2. Step 2: Convert to fraction form
    1,370.12/2,055.86 = 548.63/x
  3. Step 3: Cross multiply
    1,370.12x = 2,055.86 × 548.63
  4. Step 4: Simplify right side
    1,370.12x = 1,127,897.56
  5. Step 5: Solve for x
    x = 1,127,897.56/1,370.12
  6. Step 6: Final answer
    x = 823.21

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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.