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Finding the Fourth Proportional to 1,008.81, 1,392.16 and 566.72

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Solution

The fourth proportional to 1,008.81, 1,392.16 and 566.72 is: 782.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,008.81 : 1,392.16 = 566.72 : x
  2. Step 2: Convert to fraction form
    1,008.81/1,392.16 = 566.72/x
  3. Step 3: Cross multiply
    1,008.81x = 1,392.16 × 566.72
  4. Step 4: Simplify right side
    1,008.81x = 788,956.54
  5. Step 5: Solve for x
    x = 788,956.54/1,008.81
  6. Step 6: Final answer
    x = 782.07

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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.