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Finding the Fourth Proportional to 312,605.40, 468,908.10 and 102,192.60

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Solution

The fourth proportional to 312,605.40, 468,908.10 and 102,192.60 is: 153,288.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,605.40 : 468,908.10 = 102,192.60 : x
  2. Step 2: Convert to fraction form
    312,605.40/468,908.10 = 102,192.60/x
  3. Step 3: Cross multiply
    312,605.40x = 468,908.10 × 102,192.60
  4. Step 4: Simplify right side
    312,605.40x = 47,918,937,900.06
  5. Step 5: Solve for x
    x = 47,918,937,900.06/312,605.40
  6. Step 6: Final answer
    x = 153,288.90

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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.