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Finding the Fourth Proportional to 4,643.36, 6,968.88 and 1,909.28

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Solution

The fourth proportional to 4,643.36, 6,968.88 and 1,909.28 is: 2,865.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,643.36 : 6,968.88 = 1,909.28 : x
  2. Step 2: Convert to fraction form
    4,643.36/6,968.88 = 1,909.28/x
  3. Step 3: Cross multiply
    4,643.36x = 6,968.88 × 1,909.28
  4. Step 4: Simplify right side
    4,643.36x = 13,305,543.21
  5. Step 5: Solve for x
    x = 13,305,543.21/4,643.36
  6. Step 6: Final answer
    x = 2,865.50

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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.