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Finding the Fourth Proportional to 312,683.06, 469,019.63 and 99,447.89

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Solution

The fourth proportional to 312,683.06, 469,019.63 and 99,447.89 is: 149,170.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,683.06 : 469,019.63 = 99,447.89 : x
  2. Step 2: Convert to fraction form
    312,683.06/469,019.63 = 99,447.89/x
  3. Step 3: Cross multiply
    312,683.06x = 469,019.63 × 99,447.89
  4. Step 4: Simplify right side
    312,683.06x = 46,643,013,993.25
  5. Step 5: Solve for x
    x = 46,643,013,993.25/312,683.06
  6. Step 6: Final answer
    x = 149,170.26

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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.