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Finding the Fourth Proportional to 380,640.60, 570,548.88 and 247,615.92

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Solution

The fourth proportional to 380,640.60, 570,548.88 and 247,615.92 is: 371,155.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,640.60 : 570,548.88 = 247,615.92 : x
  2. Step 2: Convert to fraction form
    380,640.60/570,548.88 = 247,615.92/x
  3. Step 3: Cross multiply
    380,640.60x = 570,548.88 × 247,615.92
  4. Step 4: Simplify right side
    380,640.60x = 141,276,985,826.17
  5. Step 5: Solve for x
    x = 141,276,985,826.17/380,640.60
  6. Step 6: Final answer
    x = 371,155.85

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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.