Home / 389,822.40-584,296.20-221,423.40

Finding the Fourth Proportional to 389,822.40, 584,296.20 and 221,423.40

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Solution

The fourth proportional to 389,822.40, 584,296.20 and 221,423.40 is: 331,886.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,822.40 : 584,296.20 = 221,423.40 : x
  2. Step 2: Convert to fraction form
    389,822.40/584,296.20 = 221,423.40/x
  3. Step 3: Cross multiply
    389,822.40x = 584,296.20 × 221,423.40
  4. Step 4: Simplify right side
    389,822.40x = 129,376,851,211.08
  5. Step 5: Solve for x
    x = 129,376,851,211.08/389,822.40
  6. Step 6: Final answer
    x = 331,886.65

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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.