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Finding the Fourth Proportional to 518,949.88, 778,457.64 and 219,391.02

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Solution

The fourth proportional to 518,949.88, 778,457.64 and 219,391.02 is: 329,100.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,949.88 : 778,457.64 = 219,391.02 : x
  2. Step 2: Convert to fraction form
    518,949.88/778,457.64 = 219,391.02/x
  3. Step 3: Cross multiply
    518,949.88x = 778,457.64 × 219,391.02
  4. Step 4: Simplify right side
    518,949.88x = 170,786,615,666.39
  5. Step 5: Solve for x
    x = 170,786,615,666.39/518,949.88
  6. Step 6: Final answer
    x = 329,100.40

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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.