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Finding the Fourth Proportional to 518,222.60, 775,578.12 and 318,669.36

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Solution

The fourth proportional to 518,222.60, 775,578.12 and 318,669.36 is: 476,924.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,222.60 : 775,578.12 = 318,669.36 : x
  2. Step 2: Convert to fraction form
    518,222.60/775,578.12 = 318,669.36/x
  3. Step 3: Cross multiply
    518,222.60x = 775,578.12 × 318,669.36
  4. Step 4: Simplify right side
    518,222.60x = 247,152,983,130.40
  5. Step 5: Solve for x
    x = 247,152,983,130.40/518,222.60
  6. Step 6: Final answer
    x = 476,924.36

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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.