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Finding the Fourth Proportional to 380,515.78, 570,779.28 and 180,856.54

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Solution

The fourth proportional to 380,515.78, 570,779.28 and 180,856.54 is: 271,287.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,515.78 : 570,779.28 = 180,856.54 : x
  2. Step 2: Convert to fraction form
    380,515.78/570,779.28 = 180,856.54/x
  3. Step 3: Cross multiply
    380,515.78x = 570,779.28 × 180,856.54
  4. Step 4: Simplify right side
    380,515.78x = 103,229,165,684.49
  5. Step 5: Solve for x
    x = 103,229,165,684.49/380,515.78
  6. Step 6: Final answer
    x = 271,287.48

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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.