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Finding the Fourth Proportional to 1,090.24, 1,504.56 and 618.24

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Solution

The fourth proportional to 1,090.24, 1,504.56 and 618.24 is: 853.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,090.24 : 1,504.56 = 618.24 : x
  2. Step 2: Convert to fraction form
    1,090.24/1,504.56 = 618.24/x
  3. Step 3: Cross multiply
    1,090.24x = 1,504.56 × 618.24
  4. Step 4: Simplify right side
    1,090.24x = 930,179.17
  5. Step 5: Solve for x
    x = 930,179.17/1,090.24
  6. Step 6: Final answer
    x = 853.19

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1.5x scale

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.