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Finding the Fourth Proportional to 312,495.40, 468,604.86 and 90,896.68

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Solution

The fourth proportional to 312,495.40, 468,604.86 and 90,896.68 is: 136,304.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,495.40 : 468,604.86 = 90,896.68 : x
  2. Step 2: Convert to fraction form
    312,495.40/468,604.86 = 90,896.68/x
  3. Step 3: Cross multiply
    312,495.40x = 468,604.86 × 90,896.68
  4. Step 4: Simplify right side
    312,495.40x = 42,594,626,005.86
  5. Step 5: Solve for x
    x = 42,594,626,005.86/312,495.40
  6. Step 6: Final answer
    x = 136,304.81

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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.