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Finding the Fourth Proportional to 522,467.52, 721,083.96 and 318,636.72

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Solution

The fourth proportional to 522,467.52, 721,083.96 and 318,636.72 is: 439,766.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,467.52 : 721,083.96 = 318,636.72 : x
  2. Step 2: Convert to fraction form
    522,467.52/721,083.96 = 318,636.72/x
  3. Step 3: Cross multiply
    522,467.52x = 721,083.96 × 318,636.72
  4. Step 4: Simplify right side
    522,467.52x = 229,763,827,859.01
  5. Step 5: Solve for x
    x = 229,763,827,859.01/522,467.52
  6. Step 6: Final answer
    x = 439,766.72

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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.