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Finding the Fourth Proportional to 380,341.08, 570,800.85 and 140,681.73

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Solution

The fourth proportional to 380,341.08, 570,800.85 and 140,681.73 is: 211,129.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,341.08 : 570,800.85 = 140,681.73 : x
  2. Step 2: Convert to fraction form
    380,341.08/570,800.85 = 140,681.73/x
  3. Step 3: Cross multiply
    380,341.08x = 570,800.85 × 140,681.73
  4. Step 4: Simplify right side
    380,341.08x = 80,301,251,063.47
  5. Step 5: Solve for x
    x = 80,301,251,063.47/380,341.08
  6. Step 6: Final answer
    x = 211,129.58

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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.