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Finding the Fourth Proportional to 576,920.40, 865,121.40 and 221,816.40

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Solution

The fourth proportional to 576,920.40, 865,121.40 and 221,816.40 is: 332,624.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    576,920.40 : 865,121.40 = 221,816.40 : x
  2. Step 2: Convert to fraction form
    576,920.40/865,121.40 = 221,816.40/x
  3. Step 3: Cross multiply
    576,920.40x = 865,121.40 × 221,816.40
  4. Step 4: Simplify right side
    576,920.40x = 191,898,114,510.96
  5. Step 5: Solve for x
    x = 191,898,114,510.96/576,920.40
  6. Step 6: Final answer
    x = 332,624.94

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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.