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Finding the Fourth Proportional to 4,672.35, 6,429.60 and 4,643.60

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Solution

The fourth proportional to 4,672.35, 6,429.60 and 4,643.60 is: 6,390.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,672.35 : 6,429.60 = 4,643.60 : x
  2. Step 2: Convert to fraction form
    4,672.35/6,429.60 = 4,643.60/x
  3. Step 3: Cross multiply
    4,672.35x = 6,429.60 × 4,643.60
  4. Step 4: Simplify right side
    4,672.35x = 29,856,458.41
  5. Step 5: Solve for x
    x = 29,856,458.41/4,672.35
  6. Step 6: Final answer
    x = 6,390.03

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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.