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Finding the Fourth Proportional to 1,090.40, 1,504.73 and 618.34

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Solution

The fourth proportional to 1,090.40, 1,504.73 and 618.34 is: 853.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,090.40 : 1,504.73 = 618.34 : x
  2. Step 2: Convert to fraction form
    1,090.40/1,504.73 = 618.34/x
  3. Step 3: Cross multiply
    1,090.40x = 1,504.73 × 618.34
  4. Step 4: Simplify right side
    1,090.40x = 930,435.42
  5. Step 5: Solve for x
    x = 930,435.42/1,090.40
  6. Step 6: Final answer
    x = 853.29

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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.