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Finding the Fourth Proportional to 5,283.63, 7,890.75 and 4,245.21

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Solution

The fourth proportional to 5,283.63, 7,890.75 and 4,245.21 is: 6,339.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,283.63 : 7,890.75 = 4,245.21 : x
  2. Step 2: Convert to fraction form
    5,283.63/7,890.75 = 4,245.21/x
  3. Step 3: Cross multiply
    5,283.63x = 7,890.75 × 4,245.21
  4. Step 4: Simplify right side
    5,283.63x = 33,497,890.81
  5. Step 5: Solve for x
    x = 33,497,890.81/5,283.63
  6. Step 6: Final answer
    x = 6,339.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.