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Finding the Fourth Proportional to 403.48, 602.30 and 345.34

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Solution

The fourth proportional to 403.48, 602.30 and 345.34 is: 515.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.48 : 602.30 = 345.34 : x
  2. Step 2: Convert to fraction form
    403.48/602.30 = 345.34/x
  3. Step 3: Cross multiply
    403.48x = 602.30 × 345.34
  4. Step 4: Simplify right side
    403.48x = 207,998.28
  5. Step 5: Solve for x
    x = 207,998.28/403.48
  6. Step 6: Final answer
    x = 515.51

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.