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Finding the Fourth Proportional to 356,421.50, 491,740.57 and 203,349.73

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Solution

The fourth proportional to 356,421.50, 491,740.57 and 203,349.73 is: 280,553.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,421.50 : 491,740.57 = 203,349.73 : x
  2. Step 2: Convert to fraction form
    356,421.50/491,740.57 = 203,349.73/x
  3. Step 3: Cross multiply
    356,421.50x = 491,740.57 × 203,349.73
  4. Step 4: Simplify right side
    356,421.50x = 99,995,312,139.55
  5. Step 5: Solve for x
    x = 99,995,312,139.55/356,421.50
  6. Step 6: Final answer
    x = 280,553.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.