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Finding the Fourth Proportional to 428,266.28, 590,446.90 and 368,479.24

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Solution

The fourth proportional to 428,266.28, 590,446.90 and 368,479.24 is: 508,019.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,266.28 : 590,446.90 = 368,479.24 : x
  2. Step 2: Convert to fraction form
    428,266.28/590,446.90 = 368,479.24/x
  3. Step 3: Cross multiply
    428,266.28x = 590,446.90 × 368,479.24
  4. Step 4: Simplify right side
    428,266.28x = 217,567,424,972.36
  5. Step 5: Solve for x
    x = 217,567,424,972.36/428,266.28
  6. Step 6: Final answer
    x = 508,019.04

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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.