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Finding the Fourth Proportional to 608.88, 840.60 and 402.48

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Solution

The fourth proportional to 608.88, 840.60 and 402.48 is: 555.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.88 : 840.60 = 402.48 : x
  2. Step 2: Convert to fraction form
    608.88/840.60 = 402.48/x
  3. Step 3: Cross multiply
    608.88x = 840.60 × 402.48
  4. Step 4: Simplify right side
    608.88x = 338,324.69
  5. Step 5: Solve for x
    x = 338,324.69/608.88
  6. Step 6: Final answer
    x = 555.65

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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.