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Finding the Fourth Proportional to 665,914.64, 999,019.88 and 310,734.90

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Solution

The fourth proportional to 665,914.64, 999,019.88 and 310,734.90 is: 466,171.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,914.64 : 999,019.88 = 310,734.90 : x
  2. Step 2: Convert to fraction form
    665,914.64/999,019.88 = 310,734.90/x
  3. Step 3: Cross multiply
    665,914.64x = 999,019.88 × 310,734.90
  4. Step 4: Simplify right side
    665,914.64x = 310,430,342,121.39
  5. Step 5: Solve for x
    x = 310,430,342,121.39/665,914.64
  6. Step 6: Final answer
    x = 466,171.38

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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.