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Finding the Fourth Proportional to 291,425.42, 399,254.22 and 280,504.25

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Solution

The fourth proportional to 291,425.42, 399,254.22 and 280,504.25 is: 384,292.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,425.42 : 399,254.22 = 280,504.25 : x
  2. Step 2: Convert to fraction form
    291,425.42/399,254.22 = 280,504.25/x
  3. Step 3: Cross multiply
    291,425.42x = 399,254.22 × 280,504.25
  4. Step 4: Simplify right side
    291,425.42x = 111,992,503,544.16
  5. Step 5: Solve for x
    x = 111,992,503,544.16/291,425.42
  6. Step 6: Final answer
    x = 384,292.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.