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Finding the Fourth Proportional to 602.48, 830.98 and 405.68

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Solution

The fourth proportional to 602.48, 830.98 and 405.68 is: 559.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    602.48 : 830.98 = 405.68 : x
  2. Step 2: Convert to fraction form
    602.48/830.98 = 405.68/x
  3. Step 3: Cross multiply
    602.48x = 830.98 × 405.68
  4. Step 4: Simplify right side
    602.48x = 337,111.97
  5. Step 5: Solve for x
    x = 337,111.97/602.48
  6. Step 6: Final answer
    x = 559.54

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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.