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Finding the Fourth Proportional to 689.37, 950.31 and 503.07

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Solution

The fourth proportional to 689.37, 950.31 and 503.07 is: 693.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    689.37 : 950.31 = 503.07 : x
  2. Step 2: Convert to fraction form
    689.37/950.31 = 503.07/x
  3. Step 3: Cross multiply
    689.37x = 950.31 × 503.07
  4. Step 4: Simplify right side
    689.37x = 478,072.45
  5. Step 5: Solve for x
    x = 478,072.45/689.37
  6. Step 6: Final answer
    x = 693.49

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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.