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Finding the Fourth Proportional to 899.90, 1,241.32 and 568.20

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Solution

The fourth proportional to 899.90, 1,241.32 and 568.20 is: 783.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.90 : 1,241.32 = 568.20 : x
  2. Step 2: Convert to fraction form
    899.90/1,241.32 = 568.20/x
  3. Step 3: Cross multiply
    899.90x = 1,241.32 × 568.20
  4. Step 4: Simplify right side
    899.90x = 705,318.02
  5. Step 5: Solve for x
    x = 705,318.02/899.90
  6. Step 6: Final answer
    x = 783.77

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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.