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Finding the Fourth Proportional to 1,022.54, 1,411.10 and 556.79

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Solution

The fourth proportional to 1,022.54, 1,411.10 and 556.79 is: 768.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,022.54 : 1,411.10 = 556.79 : x
  2. Step 2: Convert to fraction form
    1,022.54/1,411.10 = 556.79/x
  3. Step 3: Cross multiply
    1,022.54x = 1,411.10 × 556.79
  4. Step 4: Simplify right side
    1,022.54x = 785,680.71
  5. Step 5: Solve for x
    x = 785,680.71/1,022.54
  6. Step 6: Final answer
    x = 768.37

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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.