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Finding the Fourth Proportional to 308,309.76, 425,443.91 and 187,434.27

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Solution

The fourth proportional to 308,309.76, 425,443.91 and 187,434.27 is: 258,644.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,309.76 : 425,443.91 = 187,434.27 : x
  2. Step 2: Convert to fraction form
    308,309.76/425,443.91 = 187,434.27/x
  3. Step 3: Cross multiply
    308,309.76x = 425,443.91 × 187,434.27
  4. Step 4: Simplify right side
    308,309.76x = 79,742,767,759.62
  5. Step 5: Solve for x
    x = 79,742,767,759.62/308,309.76
  6. Step 6: Final answer
    x = 258,644.97

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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.