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Finding the Fourth Proportional to 899.72, 1,242.07 and 568.49

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Solution

The fourth proportional to 899.72, 1,242.07 and 568.49 is: 784.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.72 : 1,242.07 = 568.49 : x
  2. Step 2: Convert to fraction form
    899.72/1,242.07 = 568.49/x
  3. Step 3: Cross multiply
    899.72x = 1,242.07 × 568.49
  4. Step 4: Simplify right side
    899.72x = 706,096.74
  5. Step 5: Solve for x
    x = 706,096.74/899.72
  6. Step 6: Final answer
    x = 784.80

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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.