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Finding the Fourth Proportional to 577,920.40, 865,714.20 and 328,310.80

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Solution

The fourth proportional to 577,920.40, 865,714.20 and 328,310.80 is: 491,803.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    577,920.40 : 865,714.20 = 328,310.80 : x
  2. Step 2: Convert to fraction form
    577,920.40/865,714.20 = 328,310.80/x
  3. Step 3: Cross multiply
    577,920.40x = 865,714.20 × 328,310.80
  4. Step 4: Simplify right side
    577,920.40x = 284,223,321,573.36
  5. Step 5: Solve for x
    x = 284,223,321,573.36/577,920.40
  6. Step 6: Final answer
    x = 491,803.58

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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.