Home / 5,218.40-7,827.62-1,322.80

Finding the Fourth Proportional to 5,218.40, 7,827.62 and 1,322.80

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Solution

The fourth proportional to 5,218.40, 7,827.62 and 1,322.80 is: 1,984.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,218.40 : 7,827.62 = 1,322.80 : x
  2. Step 2: Convert to fraction form
    5,218.40/7,827.62 = 1,322.80/x
  3. Step 3: Cross multiply
    5,218.40x = 7,827.62 × 1,322.80
  4. Step 4: Simplify right side
    5,218.40x = 10,354,349.55
  5. Step 5: Solve for x
    x = 10,354,349.55/5,218.40
  6. Step 6: Final answer
    x = 1,984.20

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1.5x scale

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.