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Finding the Fourth Proportional to 418,817.70, 628,226.55 and 259,385.40

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Solution

The fourth proportional to 418,817.70, 628,226.55 and 259,385.40 is: 389,078.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,817.70 : 628,226.55 = 259,385.40 : x
  2. Step 2: Convert to fraction form
    418,817.70/628,226.55 = 259,385.40/x
  3. Step 3: Cross multiply
    418,817.70x = 628,226.55 × 259,385.40
  4. Step 4: Simplify right side
    418,817.70x = 162,952,794,962.37
  5. Step 5: Solve for x
    x = 162,952,794,962.37/418,817.70
  6. Step 6: Final answer
    x = 389,078.10

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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.