Home / 345,865.23-515,359.58-308,135.36

Finding the Fourth Proportional to 345,865.23, 515,359.58 and 308,135.36

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Solution

The fourth proportional to 345,865.23, 515,359.58 and 308,135.36 is: 459,139.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,865.23 : 515,359.58 = 308,135.36 : x
  2. Step 2: Convert to fraction form
    345,865.23/515,359.58 = 308,135.36/x
  3. Step 3: Cross multiply
    345,865.23x = 515,359.58 × 308,135.36
  4. Step 4: Simplify right side
    345,865.23x = 158,800,509,460.47
  5. Step 5: Solve for x
    x = 158,800,509,460.47/345,865.23
  6. Step 6: Final answer
    x = 459,139.85

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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.