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Finding the Fourth Proportional to 312,650.64, 468,926.96 and 99,390.60

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Solution

The fourth proportional to 312,650.64, 468,926.96 and 99,390.60 is: 149,070.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,650.64 : 468,926.96 = 99,390.60 : x
  2. Step 2: Convert to fraction form
    312,650.64/468,926.96 = 99,390.60/x
  3. Step 3: Cross multiply
    312,650.64x = 468,926.96 × 99,390.60
  4. Step 4: Simplify right side
    312,650.64x = 46,606,931,413.62
  5. Step 5: Solve for x
    x = 46,606,931,413.62/312,650.64
  6. Step 6: Final answer
    x = 149,070.32

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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.