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Finding the Fourth Proportional to 259,607.30, 389,453.67 and 79,688.21

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Solution

The fourth proportional to 259,607.30, 389,453.67 and 79,688.21 is: 119,545.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,607.30 : 389,453.67 = 79,688.21 : x
  2. Step 2: Convert to fraction form
    259,607.30/389,453.67 = 79,688.21/x
  3. Step 3: Cross multiply
    259,607.30x = 389,453.67 × 79,688.21
  4. Step 4: Simplify right side
    259,607.30x = 31,034,863,892.96
  5. Step 5: Solve for x
    x = 31,034,863,892.96/259,607.30
  6. Step 6: Final answer
    x = 119,545.42

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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.