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Finding the Fourth Proportional to 899.99, 1,241.96 and 507

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Solution

The fourth proportional to 899.99, 1,241.96 and 507 is: 699.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.99 : 1,241.96 = 507 : x
  2. Step 2: Convert to fraction form
    899.99/1,241.96 = 507/x
  3. Step 3: Cross multiply
    899.99x = 1,241.96 × 507
  4. Step 4: Simplify right side
    899.99x = 629,673.72
  5. Step 5: Solve for x
    x = 629,673.72/899.99
  6. Step 6: Final answer
    x = 699.65

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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.