Home / 445,298.40-668,725.20-431,301.60

Finding the Fourth Proportional to 445,298.40, 668,725.20 and 431,301.60

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Solution

The fourth proportional to 445,298.40, 668,725.20 and 431,301.60 is: 647,705.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,298.40 : 668,725.20 = 431,301.60 : x
  2. Step 2: Convert to fraction form
    445,298.40/668,725.20 = 431,301.60/x
  3. Step 3: Cross multiply
    445,298.40x = 668,725.20 × 431,301.60
  4. Step 4: Simplify right side
    445,298.40x = 288,422,248,720.32
  5. Step 5: Solve for x
    x = 288,422,248,720.32/445,298.40
  6. Step 6: Final answer
    x = 647,705.56

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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.