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Finding the Fourth Proportional to 500.86, 691 and 314.36

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Solution

The fourth proportional to 500.86, 691 and 314.36 is: 433.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.86 : 691 = 314.36 : x
  2. Step 2: Convert to fraction form
    500.86/691 = 314.36/x
  3. Step 3: Cross multiply
    500.86x = 691 × 314.36
  4. Step 4: Simplify right side
    500.86x = 217,219.31
  5. Step 5: Solve for x
    x = 217,219.31/500.86
  6. Step 6: Final answer
    x = 433.69

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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.