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Finding the Fourth Proportional to 345,864.98, 515,359.20 and 308,135.11

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Solution

The fourth proportional to 345,864.98, 515,359.20 and 308,135.11 is: 459,139.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,864.98 : 515,359.20 = 308,135.11 : x
  2. Step 2: Convert to fraction form
    345,864.98/515,359.20 = 308,135.11/x
  3. Step 3: Cross multiply
    345,864.98x = 515,359.20 × 308,135.11
  4. Step 4: Simplify right side
    345,864.98x = 158,800,263,781.51
  5. Step 5: Solve for x
    x = 158,800,263,781.51/345,864.98
  6. Step 6: Final answer
    x = 459,139.47

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