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Finding the Fourth Proportional to 1,100.74, 1,650.32 and 928.51

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Solution

The fourth proportional to 1,100.74, 1,650.32 and 928.51 is: 1,392.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,100.74 : 1,650.32 = 928.51 : x
  2. Step 2: Convert to fraction form
    1,100.74/1,650.32 = 928.51/x
  3. Step 3: Cross multiply
    1,100.74x = 1,650.32 × 928.51
  4. Step 4: Simplify right side
    1,100.74x = 1,532,347.84
  5. Step 5: Solve for x
    x = 1,532,347.84/1,100.74
  6. Step 6: Final answer
    x = 1,392.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.