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Finding the Fourth Proportional to 628,667.40, 867,680.64 and 356,760.57

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Solution

The fourth proportional to 628,667.40, 867,680.64 and 356,760.57 is: 492,397.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,667.40 : 867,680.64 = 356,760.57 : x
  2. Step 2: Convert to fraction form
    628,667.40/867,680.64 = 356,760.57/x
  3. Step 3: Cross multiply
    628,667.40x = 867,680.64 × 356,760.57
  4. Step 4: Simplify right side
    628,667.40x = 309,554,239,704.37
  5. Step 5: Solve for x
    x = 309,554,239,704.37/628,667.40
  6. Step 6: Final answer
    x = 492,397.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.