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Finding the Fourth Proportional to 415,208.80, 622,813.20 and 265,909.60

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Solution

The fourth proportional to 415,208.80, 622,813.20 and 265,909.60 is: 398,864.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,208.80 : 622,813.20 = 265,909.60 : x
  2. Step 2: Convert to fraction form
    415,208.80/622,813.20 = 265,909.60/x
  3. Step 3: Cross multiply
    415,208.80x = 622,813.20 × 265,909.60
  4. Step 4: Simplify right side
    415,208.80x = 165,612,008,886.72
  5. Step 5: Solve for x
    x = 165,612,008,886.72/415,208.80
  6. Step 6: Final answer
    x = 398,864.40

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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.