Home / 433,981.80-647,719.20-405,638.28

Finding the Fourth Proportional to 433,981.80, 647,719.20 and 405,638.28

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Solution

The fourth proportional to 433,981.80, 647,719.20 and 405,638.28 is: 605,416.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    433,981.80 : 647,719.20 = 405,638.28 : x
  2. Step 2: Convert to fraction form
    433,981.80/647,719.20 = 405,638.28/x
  3. Step 3: Cross multiply
    433,981.80x = 647,719.20 × 405,638.28
  4. Step 4: Simplify right side
    433,981.80x = 262,739,702,210.98
  5. Step 5: Solve for x
    x = 262,739,702,210.98/433,981.80
  6. Step 6: Final answer
    x = 605,416.41

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.