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Finding the Fourth Proportional to 428.73, 594.13 and 420.51

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Solution

The fourth proportional to 428.73, 594.13 and 420.51 is: 582.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    428.73 : 594.13 = 420.51 : x
  2. Step 2: Convert to fraction form
    428.73/594.13 = 420.51/x
  3. Step 3: Cross multiply
    428.73x = 594.13 × 420.51
  4. Step 4: Simplify right side
    428.73x = 249,837.61
  5. Step 5: Solve for x
    x = 249,837.61/428.73
  6. Step 6: Final answer
    x = 582.74

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.