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Finding the Fourth Proportional to 577,689.40, 865,367.70 and 328,079.80

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Solution

The fourth proportional to 577,689.40, 865,367.70 and 328,079.80 is: 491,457.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    577,689.40 : 865,367.70 = 328,079.80 : x
  2. Step 2: Convert to fraction form
    577,689.40/865,367.70 = 328,079.80/x
  3. Step 3: Cross multiply
    577,689.40x = 865,367.70 × 328,079.80
  4. Step 4: Simplify right side
    577,689.40x = 283,909,661,942.46
  5. Step 5: Solve for x
    x = 283,909,661,942.46/577,689.40
  6. Step 6: Final answer
    x = 491,457.28

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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.