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Finding the Fourth Proportional to 407,819.60, 611,729.40 and 370,421.90

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Solution

The fourth proportional to 407,819.60, 611,729.40 and 370,421.90 is: 555,632.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,819.60 : 611,729.40 = 370,421.90 : x
  2. Step 2: Convert to fraction form
    407,819.60/611,729.40 = 370,421.90/x
  3. Step 3: Cross multiply
    407,819.60x = 611,729.40 × 370,421.90
  4. Step 4: Simplify right side
    407,819.60x = 226,597,966,633.86
  5. Step 5: Solve for x
    x = 226,597,966,633.86/407,819.60
  6. Step 6: Final answer
    x = 555,632.85

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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.