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Finding the Fourth Proportional to 968.21, 1,336.12 and 569.79

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Solution

The fourth proportional to 968.21, 1,336.12 and 569.79 is: 786.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.21 : 1,336.12 = 569.79 : x
  2. Step 2: Convert to fraction form
    968.21/1,336.12 = 569.79/x
  3. Step 3: Cross multiply
    968.21x = 1,336.12 × 569.79
  4. Step 4: Simplify right side
    968.21x = 761,307.81
  5. Step 5: Solve for x
    x = 761,307.81/968.21
  6. Step 6: Final answer
    x = 786.30

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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.