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Finding the Fourth Proportional to 1,030.24, 1,551.44 and 743.68

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Solution

The fourth proportional to 1,030.24, 1,551.44 and 743.68 is: 1,119.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,030.24 : 1,551.44 = 743.68 : x
  2. Step 2: Convert to fraction form
    1,030.24/1,551.44 = 743.68/x
  3. Step 3: Cross multiply
    1,030.24x = 1,551.44 × 743.68
  4. Step 4: Simplify right side
    1,030.24x = 1,153,774.90
  5. Step 5: Solve for x
    x = 1,153,774.90/1,030.24
  6. Step 6: Final answer
    x = 1,119.91

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.