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Finding the Fourth Proportional to 1,662.40, 2,495.20 and 797.28

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Solution

The fourth proportional to 1,662.40, 2,495.20 and 797.28 is: 1,196.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,662.40 : 2,495.20 = 797.28 : x
  2. Step 2: Convert to fraction form
    1,662.40/2,495.20 = 797.28/x
  3. Step 3: Cross multiply
    1,662.40x = 2,495.20 × 797.28
  4. Step 4: Simplify right side
    1,662.40x = 1,989,373.06
  5. Step 5: Solve for x
    x = 1,989,373.06/1,662.40
  6. Step 6: Final answer
    x = 1,196.69

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1.5x scale

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.