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Finding the Fourth Proportional to 380,794.88, 570,127.36 and 287,006.72

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Solution

The fourth proportional to 380,794.88, 570,127.36 and 287,006.72 is: 429,707.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,794.88 : 570,127.36 = 287,006.72 : x
  2. Step 2: Convert to fraction form
    380,794.88/570,127.36 = 287,006.72/x
  3. Step 3: Cross multiply
    380,794.88x = 570,127.36 × 287,006.72
  4. Step 4: Simplify right side
    380,794.88x = 163,630,383,575.86
  5. Step 5: Solve for x
    x = 163,630,383,575.86/380,794.88
  6. Step 6: Final answer
    x = 429,707.42

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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.