Home / 389,869.40-584,804.10-221,324.60

Finding the Fourth Proportional to 389,869.40, 584,804.10 and 221,324.60

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Solution

The fourth proportional to 389,869.40, 584,804.10 and 221,324.60 is: 331,986.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,869.40 : 584,804.10 = 221,324.60 : x
  2. Step 2: Convert to fraction form
    389,869.40/584,804.10 = 221,324.60/x
  3. Step 3: Cross multiply
    389,869.40x = 584,804.10 × 221,324.60
  4. Step 4: Simplify right side
    389,869.40x = 129,431,533,510.86
  5. Step 5: Solve for x
    x = 129,431,533,510.86/389,869.40
  6. Step 6: Final answer
    x = 331,986.90

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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.