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Finding the Fourth Proportional to 576,134.40, 863,942.40 and 221,030.40

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Solution

The fourth proportional to 576,134.40, 863,942.40 and 221,030.40 is: 331,446.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    576,134.40 : 863,942.40 = 221,030.40 : x
  2. Step 2: Convert to fraction form
    576,134.40/863,942.40 = 221,030.40/x
  3. Step 3: Cross multiply
    576,134.40x = 863,942.40 × 221,030.40
  4. Step 4: Simplify right side
    576,134.40x = 190,957,534,248.96
  5. Step 5: Solve for x
    x = 190,957,534,248.96/576,134.40
  6. Step 6: Final answer
    x = 331,446.16

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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.