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Finding the Fourth Proportional to 576,911.40, 865,107.90 and 221,807.40

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Solution

The fourth proportional to 576,911.40, 865,107.90 and 221,807.40 is: 332,611.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    576,911.40 : 865,107.90 = 221,807.40 : x
  2. Step 2: Convert to fraction form
    576,911.40/865,107.90 = 221,807.40/x
  3. Step 3: Cross multiply
    576,911.40x = 865,107.90 × 221,807.40
  4. Step 4: Simplify right side
    576,911.40x = 191,887,334,018.46
  5. Step 5: Solve for x
    x = 191,887,334,018.46/576,911.40
  6. Step 6: Final answer
    x = 332,611.44

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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.