Home / 389,435.05-584,231.55-221,036.05

Finding the Fourth Proportional to 389,435.05, 584,231.55 and 221,036.05

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Solution

The fourth proportional to 389,435.05, 584,231.55 and 221,036.05 is: 331,598.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,435.05 : 584,231.55 = 221,036.05 : x
  2. Step 2: Convert to fraction form
    389,435.05/584,231.55 = 221,036.05/x
  3. Step 3: Cross multiply
    389,435.05x = 584,231.55 × 221,036.05
  4. Step 4: Simplify right side
    389,435.05x = 129,136,234,097.38
  5. Step 5: Solve for x
    x = 129,136,234,097.38/389,435.05
  6. Step 6: Final answer
    x = 331,598.90

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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.