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Finding the Fourth Proportional to 388,945, 583,515.90 and 108,462.28

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Solution

The fourth proportional to 388,945, 583,515.90 and 108,462.28 is: 162,720.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,945 : 583,515.90 = 108,462.28 : x
  2. Step 2: Convert to fraction form
    388,945/583,515.90 = 108,462.28/x
  3. Step 3: Cross multiply
    388,945x = 583,515.90 × 108,462.28
  4. Step 4: Simplify right side
    388,945x = 63,289,464,930.25
  5. Step 5: Solve for x
    x = 63,289,464,930.25/388,945
  6. Step 6: Final answer
    x = 162,720.86

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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.