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Finding the Fourth Proportional to 1,040.32, 1,435.68 and 574.56

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Solution

The fourth proportional to 1,040.32, 1,435.68 and 574.56 is: 792.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,040.32 : 1,435.68 = 574.56 : x
  2. Step 2: Convert to fraction form
    1,040.32/1,435.68 = 574.56/x
  3. Step 3: Cross multiply
    1,040.32x = 1,435.68 × 574.56
  4. Step 4: Simplify right side
    1,040.32x = 824,884.30
  5. Step 5: Solve for x
    x = 824,884.30/1,040.32
  6. Step 6: Final answer
    x = 792.91

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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.