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Finding the Fourth Proportional to 1,090.39, 1,504.47 and 648.07

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Solution

The fourth proportional to 1,090.39, 1,504.47 and 648.07 is: 894.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,090.39 : 1,504.47 = 648.07 : x
  2. Step 2: Convert to fraction form
    1,090.39/1,504.47 = 648.07/x
  3. Step 3: Cross multiply
    1,090.39x = 1,504.47 × 648.07
  4. Step 4: Simplify right side
    1,090.39x = 975,001.87
  5. Step 5: Solve for x
    x = 975,001.87/1,090.39
  6. Step 6: Final answer
    x = 894.18

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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.