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Finding the Fourth Proportional to 1,643.96, 2,267.62 and 1,054.28

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Solution

The fourth proportional to 1,643.96, 2,267.62 and 1,054.28 is: 1,454.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,643.96 : 2,267.62 = 1,054.28 : x
  2. Step 2: Convert to fraction form
    1,643.96/2,267.62 = 1,054.28/x
  3. Step 3: Cross multiply
    1,643.96x = 2,267.62 × 1,054.28
  4. Step 4: Simplify right side
    1,643.96x = 2,390,706.41
  5. Step 5: Solve for x
    x = 2,390,706.41/1,643.96
  6. Step 6: Final answer
    x = 1,454.24

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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.