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Finding the Fourth Proportional to 518,813.60, 776,991.60 and 351,696.80

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Solution

The fourth proportional to 518,813.60, 776,991.60 and 351,696.80 is: 526,712.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,813.60 : 776,991.60 = 351,696.80 : x
  2. Step 2: Convert to fraction form
    518,813.60/776,991.60 = 351,696.80/x
  3. Step 3: Cross multiply
    518,813.60x = 776,991.60 × 351,696.80
  4. Step 4: Simplify right side
    518,813.60x = 273,265,459,346.88
  5. Step 5: Solve for x
    x = 273,265,459,346.88/518,813.60
  6. Step 6: Final answer
    x = 526,712.21

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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.