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Finding the Fourth Proportional to 1,028.78, 1,543.26 and 452.06

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Solution

The fourth proportional to 1,028.78, 1,543.26 and 452.06 is: 678.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,028.78 : 1,543.26 = 452.06 : x
  2. Step 2: Convert to fraction form
    1,028.78/1,543.26 = 452.06/x
  3. Step 3: Cross multiply
    1,028.78x = 1,543.26 × 452.06
  4. Step 4: Simplify right side
    1,028.78x = 697,646.12
  5. Step 5: Solve for x
    x = 697,646.12/1,028.78
  6. Step 6: Final answer
    x = 678.13

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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.