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Finding the Fourth Proportional to 356,605.28, 492,165.70 and 220,683

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Solution

The fourth proportional to 356,605.28, 492,165.70 and 220,683 is: 304,573.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,605.28 : 492,165.70 = 220,683 : x
  2. Step 2: Convert to fraction form
    356,605.28/492,165.70 = 220,683/x
  3. Step 3: Cross multiply
    356,605.28x = 492,165.70 × 220,683
  4. Step 4: Simplify right side
    356,605.28x = 108,612,603,173.10
  5. Step 5: Solve for x
    x = 108,612,603,173.10/356,605.28
  6. Step 6: Final answer
    x = 304,573.74

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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.