Home / 289,719.22-399,813.40-160,666.78

Finding the Fourth Proportional to 289,719.22, 399,813.40 and 160,666.78

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Solution

The fourth proportional to 289,719.22, 399,813.40 and 160,666.78 is: 221,720.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,719.22 : 399,813.40 = 160,666.78 : x
  2. Step 2: Convert to fraction form
    289,719.22/399,813.40 = 160,666.78/x
  3. Step 3: Cross multiply
    289,719.22x = 399,813.40 × 160,666.78
  4. Step 4: Simplify right side
    289,719.22x = 64,236,731,578.85
  5. Step 5: Solve for x
    x = 64,236,731,578.85/289,719.22
  6. Step 6: Final answer
    x = 221,720.64

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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.