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Finding the Fourth Proportional to 661,019.43, 912,485.87 and 446,450.12

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Solution

The fourth proportional to 661,019.43, 912,485.87 and 446,450.12 is: 616,289.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,019.43 : 912,485.87 = 446,450.12 : x
  2. Step 2: Convert to fraction form
    661,019.43/912,485.87 = 446,450.12/x
  3. Step 3: Cross multiply
    661,019.43x = 912,485.87 × 446,450.12
  4. Step 4: Simplify right side
    661,019.43x = 407,379,429,557.14
  5. Step 5: Solve for x
    x = 407,379,429,557.14/661,019.43
  6. Step 6: Final answer
    x = 616,289.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.