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Finding the Fourth Proportional to 661,537.38, 912,989.37 and 389,690.82

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Solution

The fourth proportional to 661,537.38, 912,989.37 and 389,690.82 is: 537,813.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,537.38 : 912,989.37 = 389,690.82 : x
  2. Step 2: Convert to fraction form
    661,537.38/912,989.37 = 389,690.82/x
  3. Step 3: Cross multiply
    661,537.38x = 912,989.37 × 389,690.82
  4. Step 4: Simplify right side
    661,537.38x = 355,783,576,246.58
  5. Step 5: Solve for x
    x = 355,783,576,246.58/661,537.38
  6. Step 6: Final answer
    x = 537,813.26

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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.