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Finding the Fourth Proportional to 1,008.87, 1,392.16 and 566.68

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Solution

The fourth proportional to 1,008.87, 1,392.16 and 566.68 is: 781.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,008.87 : 1,392.16 = 566.68 : x
  2. Step 2: Convert to fraction form
    1,008.87/1,392.16 = 566.68/x
  3. Step 3: Cross multiply
    1,008.87x = 1,392.16 × 566.68
  4. Step 4: Simplify right side
    1,008.87x = 788,915.47
  5. Step 5: Solve for x
    x = 788,915.47/1,008.87
  6. Step 6: Final answer
    x = 781.98

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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.