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Finding the Fourth Proportional to 518,315.80, 777,473.70 and 511,672.79

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Solution

The fourth proportional to 518,315.80, 777,473.70 and 511,672.79 is: 767,509.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,315.80 : 777,473.70 = 511,672.79 : x
  2. Step 2: Convert to fraction form
    518,315.80/777,473.70 = 511,672.79/x
  3. Step 3: Cross multiply
    518,315.80x = 777,473.70 × 511,672.79
  4. Step 4: Simplify right side
    518,315.80x = 397,812,137,230.62
  5. Step 5: Solve for x
    x = 397,812,137,230.62/518,315.80
  6. Step 6: Final answer
    x = 767,509.19

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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.