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Finding the Fourth Proportional to 421,567.20, 631,659.60 and 351,064.80

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Solution

The fourth proportional to 421,567.20, 631,659.60 and 351,064.80 is: 526,021.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,567.20 : 631,659.60 = 351,064.80 : x
  2. Step 2: Convert to fraction form
    421,567.20/631,659.60 = 351,064.80/x
  3. Step 3: Cross multiply
    421,567.20x = 631,659.60 × 351,064.80
  4. Step 4: Simplify right side
    421,567.20x = 221,753,451,142.08
  5. Step 5: Solve for x
    x = 221,753,451,142.08/421,567.20
  6. Step 6: Final answer
    x = 526,021.60

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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.