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Finding the Fourth Proportional to 518,012.69, 777,124.51 and 218,494.40

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Solution

The fourth proportional to 518,012.69, 777,124.51 and 218,494.40 is: 327,786.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,012.69 : 777,124.51 = 218,494.40 : x
  2. Step 2: Convert to fraction form
    518,012.69/777,124.51 = 218,494.40/x
  3. Step 3: Cross multiply
    518,012.69x = 777,124.51 × 218,494.40
  4. Step 4: Simplify right side
    518,012.69x = 169,797,349,105.89
  5. Step 5: Solve for x
    x = 169,797,349,105.89/518,012.69
  6. Step 6: Final answer
    x = 327,786.08

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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.