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Finding the Fourth Proportional to 501.63, 691.86 and 351.99

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Solution

The fourth proportional to 501.63, 691.86 and 351.99 is: 485.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    501.63 : 691.86 = 351.99 : x
  2. Step 2: Convert to fraction form
    501.63/691.86 = 351.99/x
  3. Step 3: Cross multiply
    501.63x = 691.86 × 351.99
  4. Step 4: Simplify right side
    501.63x = 243,527.80
  5. Step 5: Solve for x
    x = 243,527.80/501.63
  6. Step 6: Final answer
    x = 485.47

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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.