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Finding the Fourth Proportional to 380,475.30, 570,737.55 and 127,745.58

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Solution

The fourth proportional to 380,475.30, 570,737.55 and 127,745.58 is: 191,626.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,475.30 : 570,737.55 = 127,745.58 : x
  2. Step 2: Convert to fraction form
    380,475.30/570,737.55 = 127,745.58/x
  3. Step 3: Cross multiply
    380,475.30x = 570,737.55 × 127,745.58
  4. Step 4: Simplify right side
    380,475.30x = 72,909,199,352.53
  5. Step 5: Solve for x
    x = 72,909,199,352.53/380,475.30
  6. Step 6: Final answer
    x = 191,626.63

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1.5x scale

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.