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Finding the Fourth Proportional to 6,448.40, 8,899.80 and 4,679.36

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Solution

The fourth proportional to 6,448.40, 8,899.80 and 4,679.36 is: 6,458.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,448.40 : 8,899.80 = 4,679.36 : x
  2. Step 2: Convert to fraction form
    6,448.40/8,899.80 = 4,679.36/x
  3. Step 3: Cross multiply
    6,448.40x = 8,899.80 × 4,679.36
  4. Step 4: Simplify right side
    6,448.40x = 41,645,368.13
  5. Step 5: Solve for x
    x = 41,645,368.13/6,448.40
  6. Step 6: Final answer
    x = 6,458.25

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1.5x scale

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.