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Finding the Fourth Proportional to 576,646.80, 865,121.40 and 221,672.40

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Solution

The fourth proportional to 576,646.80, 865,121.40 and 221,672.40 is: 332,566.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    576,646.80 : 865,121.40 = 221,672.40 : x
  2. Step 2: Convert to fraction form
    576,646.80/865,121.40 = 221,672.40/x
  3. Step 3: Cross multiply
    576,646.80x = 865,121.40 × 221,672.40
  4. Step 4: Simplify right side
    576,646.80x = 191,773,537,029.36
  5. Step 5: Solve for x
    x = 191,773,537,029.36/576,646.80
  6. Step 6: Final answer
    x = 332,566.72

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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.