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Finding the Fourth Proportional to 1,808.40, 2,495.76 and 1,022.64

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Solution

The fourth proportional to 1,808.40, 2,495.76 and 1,022.64 is: 1,411.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,808.40 : 2,495.76 = 1,022.64 : x
  2. Step 2: Convert to fraction form
    1,808.40/2,495.76 = 1,022.64/x
  3. Step 3: Cross multiply
    1,808.40x = 2,495.76 × 1,022.64
  4. Step 4: Simplify right side
    1,808.40x = 2,552,264.01
  5. Step 5: Solve for x
    x = 2,552,264.01/1,808.40
  6. Step 6: Final answer
    x = 1,411.34

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.