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Finding the Fourth Proportional to 6,248.80, 8,629.80 and 5,405.45

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Solution

The fourth proportional to 6,248.80, 8,629.80 and 5,405.45 is: 7,465.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,248.80 : 8,629.80 = 5,405.45 : x
  2. Step 2: Convert to fraction form
    6,248.80/8,629.80 = 5,405.45/x
  3. Step 3: Cross multiply
    6,248.80x = 8,629.80 × 5,405.45
  4. Step 4: Simplify right side
    6,248.80x = 46,647,952.41
  5. Step 5: Solve for x
    x = 46,647,952.41/6,248.80
  6. Step 6: Final answer
    x = 7,465.11

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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.