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Finding the Fourth Proportional to 1,040.21, 1,435.51 and 568.12

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Solution

The fourth proportional to 1,040.21, 1,435.51 and 568.12 is: 784.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,040.21 : 1,435.51 = 568.12 : x
  2. Step 2: Convert to fraction form
    1,040.21/1,435.51 = 568.12/x
  3. Step 3: Cross multiply
    1,040.21x = 1,435.51 × 568.12
  4. Step 4: Simplify right side
    1,040.21x = 815,541.94
  5. Step 5: Solve for x
    x = 815,541.94/1,040.21
  6. Step 6: Final answer
    x = 784.02

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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.