Home / 645,171.20-889,023.20-499,089.58

Finding the Fourth Proportional to 645,171.20, 889,023.20 and 499,089.58

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Solution

The fourth proportional to 645,171.20, 889,023.20 and 499,089.58 is: 687,727.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,171.20 : 889,023.20 = 499,089.58 : x
  2. Step 2: Convert to fraction form
    645,171.20/889,023.20 = 499,089.58/x
  3. Step 3: Cross multiply
    645,171.20x = 889,023.20 × 499,089.58
  4. Step 4: Simplify right side
    645,171.20x = 443,702,215,498.26
  5. Step 5: Solve for x
    x = 443,702,215,498.26/645,171.20
  6. Step 6: Final answer
    x = 687,727.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.