Home / 445,890.80-668,836.20-209,257.40

Finding the Fourth Proportional to 445,890.80, 668,836.20 and 209,257.40

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Solution

The fourth proportional to 445,890.80, 668,836.20 and 209,257.40 is: 313,886.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,890.80 : 668,836.20 = 209,257.40 : x
  2. Step 2: Convert to fraction form
    445,890.80/668,836.20 = 209,257.40/x
  3. Step 3: Cross multiply
    445,890.80x = 668,836.20 × 209,257.40
  4. Step 4: Simplify right side
    445,890.80x = 139,958,924,237.88
  5. Step 5: Solve for x
    x = 139,958,924,237.88/445,890.80
  6. Step 6: Final answer
    x = 313,886.10

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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.