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Finding the Fourth Proportional to 265,421.20, 398,131.80 and 202,435.60

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Solution

The fourth proportional to 265,421.20, 398,131.80 and 202,435.60 is: 303,653.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,421.20 : 398,131.80 = 202,435.60 : x
  2. Step 2: Convert to fraction form
    265,421.20/398,131.80 = 202,435.60/x
  3. Step 3: Cross multiply
    265,421.20x = 398,131.80 × 202,435.60
  4. Step 4: Simplify right side
    265,421.20x = 80,596,049,812.08
  5. Step 5: Solve for x
    x = 80,596,049,812.08/265,421.20
  6. Step 6: Final answer
    x = 303,653.40

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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.