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Finding the Fourth Proportional to 479,996.50, 720,111.40 and 147,572.50

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Solution

The fourth proportional to 479,996.50, 720,111.40 and 147,572.50 is: 221,394.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,996.50 : 720,111.40 = 147,572.50 : x
  2. Step 2: Convert to fraction form
    479,996.50/720,111.40 = 147,572.50/x
  3. Step 3: Cross multiply
    479,996.50x = 720,111.40 × 147,572.50
  4. Step 4: Simplify right side
    479,996.50x = 106,268,639,576.50
  5. Step 5: Solve for x
    x = 106,268,639,576.50/479,996.50
  6. Step 6: Final answer
    x = 221,394.61

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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.