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Finding the Fourth Proportional to 354,643.80, 531,090.90 and 265,414.20

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Solution

The fourth proportional to 354,643.80, 531,090.90 and 265,414.20 is: 397,466.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,643.80 : 531,090.90 = 265,414.20 : x
  2. Step 2: Convert to fraction form
    354,643.80/531,090.90 = 265,414.20/x
  3. Step 3: Cross multiply
    354,643.80x = 531,090.90 × 265,414.20
  4. Step 4: Simplify right side
    354,643.80x = 140,959,066,350.78
  5. Step 5: Solve for x
    x = 140,959,066,350.78/354,643.80
  6. Step 6: Final answer
    x = 397,466.60

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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.