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Finding the Fourth Proportional to 661,427.44, 912,743.44 and 389,506.79

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Solution

The fourth proportional to 661,427.44, 912,743.44 and 389,506.79 is: 537,503.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,427.44 : 912,743.44 = 389,506.79 : x
  2. Step 2: Convert to fraction form
    661,427.44/912,743.44 = 389,506.79/x
  3. Step 3: Cross multiply
    661,427.44x = 912,743.44 × 389,506.79
  4. Step 4: Simplify right side
    661,427.44x = 355,519,768,716.05
  5. Step 5: Solve for x
    x = 355,519,768,716.05/661,427.44
  6. Step 6: Final answer
    x = 537,503.81

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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.