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Finding the Fourth Proportional to 308,343.31, 462,593.63 and 128,368.94

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Solution

The fourth proportional to 308,343.31, 462,593.63 and 128,368.94 is: 192,586.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,343.31 : 462,593.63 = 128,368.94 : x
  2. Step 2: Convert to fraction form
    308,343.31/462,593.63 = 128,368.94/x
  3. Step 3: Cross multiply
    308,343.31x = 462,593.63 × 128,368.94
  4. Step 4: Simplify right side
    308,343.31x = 59,382,651,941.81
  5. Step 5: Solve for x
    x = 59,382,651,941.81/308,343.31
  6. Step 6: Final answer
    x = 192,586.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.