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Finding the Fourth Proportional to 1,130.96, 1,560.78 and 633.68

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Solution

The fourth proportional to 1,130.96, 1,560.78 and 633.68 is: 874.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,130.96 : 1,560.78 = 633.68 : x
  2. Step 2: Convert to fraction form
    1,130.96/1,560.78 = 633.68/x
  3. Step 3: Cross multiply
    1,130.96x = 1,560.78 × 633.68
  4. Step 4: Simplify right side
    1,130.96x = 989,035.07
  5. Step 5: Solve for x
    x = 989,035.07/1,130.96
  6. Step 6: Final answer
    x = 874.51

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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.