Home / 445,982.40-669,751.20-431,985.60

Finding the Fourth Proportional to 445,982.40, 669,751.20 and 431,985.60

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Solution

The fourth proportional to 445,982.40, 669,751.20 and 431,985.60 is: 648,731.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,982.40 : 669,751.20 = 431,985.60 : x
  2. Step 2: Convert to fraction form
    445,982.40/669,751.20 = 431,985.60/x
  3. Step 3: Cross multiply
    445,982.40x = 669,751.20 × 431,985.60
  4. Step 4: Simplify right side
    445,982.40x = 289,322,873,982.72
  5. Step 5: Solve for x
    x = 289,322,873,982.72/445,982.40
  6. Step 6: Final answer
    x = 648,731.60

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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.