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Finding the Fourth Proportional to 721,960.55, 995,992.74 and 435,321.40

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Solution

The fourth proportional to 721,960.55, 995,992.74 and 435,321.40 is: 600,554.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,960.55 : 995,992.74 = 435,321.40 : x
  2. Step 2: Convert to fraction form
    721,960.55/995,992.74 = 435,321.40/x
  3. Step 3: Cross multiply
    721,960.55x = 995,992.74 × 435,321.40
  4. Step 4: Simplify right side
    721,960.55x = 433,576,950,542.91
  5. Step 5: Solve for x
    x = 433,576,950,542.91/721,960.55
  6. Step 6: Final answer
    x = 600,554.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.