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Finding the Fourth Proportional to 308,879.20, 463,318.80 and 87,263.20

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Solution

The fourth proportional to 308,879.20, 463,318.80 and 87,263.20 is: 130,894.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,879.20 : 463,318.80 = 87,263.20 : x
  2. Step 2: Convert to fraction form
    308,879.20/463,318.80 = 87,263.20/x
  3. Step 3: Cross multiply
    308,879.20x = 463,318.80 × 87,263.20
  4. Step 4: Simplify right side
    308,879.20x = 40,430,681,108.16
  5. Step 5: Solve for x
    x = 40,430,681,108.16/308,879.20
  6. Step 6: Final answer
    x = 130,894.80

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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.