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Finding the Fourth Proportional to 380,728.19, 570,690.41 and 127,768.83

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Solution

The fourth proportional to 380,728.19, 570,690.41 and 127,768.83 is: 191,518.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,728.19 : 570,690.41 = 127,768.83 : x
  2. Step 2: Convert to fraction form
    380,728.19/570,690.41 = 127,768.83/x
  3. Step 3: Cross multiply
    380,728.19x = 570,690.41 × 127,768.83
  4. Step 4: Simplify right side
    380,728.19x = 72,916,445,339.08
  5. Step 5: Solve for x
    x = 72,916,445,339.08/380,728.19
  6. Step 6: Final answer
    x = 191,518.38

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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.