Home / 445,904.80-668,857.20-209,271.40

Finding the Fourth Proportional to 445,904.80, 668,857.20 and 209,271.40

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Solution

The fourth proportional to 445,904.80, 668,857.20 and 209,271.40 is: 313,907.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,904.80 : 668,857.20 = 209,271.40 : x
  2. Step 2: Convert to fraction form
    445,904.80/668,857.20 = 209,271.40/x
  3. Step 3: Cross multiply
    445,904.80x = 668,857.20 × 209,271.40
  4. Step 4: Simplify right side
    445,904.80x = 139,972,682,644.08
  5. Step 5: Solve for x
    x = 139,972,682,644.08/445,904.80
  6. Step 6: Final answer
    x = 313,907.10

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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.