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Finding the Fourth Proportional to 783.04, 1,172.48 and 575.28

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Solution

The fourth proportional to 783.04, 1,172.48 and 575.28 is: 861.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    783.04 : 1,172.48 = 575.28 : x
  2. Step 2: Convert to fraction form
    783.04/1,172.48 = 575.28/x
  3. Step 3: Cross multiply
    783.04x = 1,172.48 × 575.28
  4. Step 4: Simplify right side
    783.04x = 674,504.29
  5. Step 5: Solve for x
    x = 674,504.29/783.04
  6. Step 6: Final answer
    x = 861.39

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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.