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Finding the Fourth Proportional to 1,370.52, 2,054.16 and 720.90

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Solution

The fourth proportional to 1,370.52, 2,054.16 and 720.90 is: 1,080.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,370.52 : 2,054.16 = 720.90 : x
  2. Step 2: Convert to fraction form
    1,370.52/2,054.16 = 720.90/x
  3. Step 3: Cross multiply
    1,370.52x = 2,054.16 × 720.90
  4. Step 4: Simplify right side
    1,370.52x = 1,480,843.94
  5. Step 5: Solve for x
    x = 1,480,843.94/1,370.52
  6. Step 6: Final answer
    x = 1,080.50

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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.