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Finding the Fourth Proportional to 415,328.80, 622,118.40 and 415,328.80

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Solution

The fourth proportional to 415,328.80, 622,118.40 and 415,328.80 is: 622,118.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,328.80 : 622,118.40 = 415,328.80 : x
  2. Step 2: Convert to fraction form
    415,328.80/622,118.40 = 415,328.80/x
  3. Step 3: Cross multiply
    415,328.80x = 622,118.40 × 415,328.80
  4. Step 4: Simplify right side
    415,328.80x = 258,383,688,529.92
  5. Step 5: Solve for x
    x = 258,383,688,529.92/415,328.80
  6. Step 6: Final answer
    x = 622,118.40

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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.