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Finding the Fourth Proportional to 345,869.73, 515,366.28 and 308,139.87

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Solution

The fourth proportional to 345,869.73, 515,366.28 and 308,139.87 is: 459,146.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,869.73 : 515,366.28 = 308,139.87 : x
  2. Step 2: Convert to fraction form
    345,869.73/515,366.28 = 308,139.87/x
  3. Step 3: Cross multiply
    345,869.73x = 515,366.28 × 308,139.87
  4. Step 4: Simplify right side
    345,869.73x = 158,804,898,521.58
  5. Step 5: Solve for x
    x = 158,804,898,521.58/345,869.73
  6. Step 6: Final answer
    x = 459,146.57

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.