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Finding the Fourth Proportional to 1,011.89, 1,396.54 and 569.88

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Solution

The fourth proportional to 1,011.89, 1,396.54 and 569.88 is: 786.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,011.89 : 1,396.54 = 569.88 : x
  2. Step 2: Convert to fraction form
    1,011.89/1,396.54 = 569.88/x
  3. Step 3: Cross multiply
    1,011.89x = 1,396.54 × 569.88
  4. Step 4: Simplify right side
    1,011.89x = 795,860.22
  5. Step 5: Solve for x
    x = 795,860.22/1,011.89
  6. Step 6: Final answer
    x = 786.51

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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.