Home / 405,946.30-608,919.45-389,616.70

Finding the Fourth Proportional to 405,946.30, 608,919.45 and 389,616.70

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Solution

The fourth proportional to 405,946.30, 608,919.45 and 389,616.70 is: 584,425.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,946.30 : 608,919.45 = 389,616.70 : x
  2. Step 2: Convert to fraction form
    405,946.30/608,919.45 = 389,616.70/x
  3. Step 3: Cross multiply
    405,946.30x = 608,919.45 × 389,616.70
  4. Step 4: Simplify right side
    405,946.30x = 237,245,186,674.82
  5. Step 5: Solve for x
    x = 237,245,186,674.82/405,946.30
  6. Step 6: Final answer
    x = 584,425.05

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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.