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Finding the Fourth Proportional to 421,454.80, 632,182.20 and 418,830.40

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Solution

The fourth proportional to 421,454.80, 632,182.20 and 418,830.40 is: 628,245.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,454.80 : 632,182.20 = 418,830.40 : x
  2. Step 2: Convert to fraction form
    421,454.80/632,182.20 = 418,830.40/x
  3. Step 3: Cross multiply
    421,454.80x = 632,182.20 × 418,830.40
  4. Step 4: Simplify right side
    421,454.80x = 264,777,123,698.88
  5. Step 5: Solve for x
    x = 264,777,123,698.88/421,454.80
  6. Step 6: Final answer
    x = 628,245.60

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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.