Home / 678,405.63-1,017,756.07-205,078.69

Finding the Fourth Proportional to 678,405.63, 1,017,756.07 and 205,078.69

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Solution

The fourth proportional to 678,405.63, 1,017,756.07 and 205,078.69 is: 307,662.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,405.63 : 1,017,756.07 = 205,078.69 : x
  2. Step 2: Convert to fraction form
    678,405.63/1,017,756.07 = 205,078.69/x
  3. Step 3: Cross multiply
    678,405.63x = 1,017,756.07 × 205,078.69
  4. Step 4: Simplify right side
    678,405.63x = 208,720,078,518.06
  5. Step 5: Solve for x
    x = 208,720,078,518.06/678,405.63
  6. Step 6: Final answer
    x = 307,662.66

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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.