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Finding the Fourth Proportional to 502.09, 690.60 and 403.63

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Solution

The fourth proportional to 502.09, 690.60 and 403.63 is: 555.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.09 : 690.60 = 403.63 : x
  2. Step 2: Convert to fraction form
    502.09/690.60 = 403.63/x
  3. Step 3: Cross multiply
    502.09x = 690.60 × 403.63
  4. Step 4: Simplify right side
    502.09x = 278,746.88
  5. Step 5: Solve for x
    x = 278,746.88/502.09
  6. Step 6: Final answer
    x = 555.17

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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.