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Finding the Fourth Proportional to 414,536.80, 621,805.20 and 265,237.60

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Solution

The fourth proportional to 414,536.80, 621,805.20 and 265,237.60 is: 397,856.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    414,536.80 : 621,805.20 = 265,237.60 : x
  2. Step 2: Convert to fraction form
    414,536.80/621,805.20 = 265,237.60/x
  3. Step 3: Cross multiply
    414,536.80x = 621,805.20 × 265,237.60
  4. Step 4: Simplify right side
    414,536.80x = 164,926,118,915.52
  5. Step 5: Solve for x
    x = 164,926,118,915.52/414,536.80
  6. Step 6: Final answer
    x = 397,856.40

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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.