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Finding the Fourth Proportional to 955.48, 1,316.28 and 675.40

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Solution

The fourth proportional to 955.48, 1,316.28 and 675.40 is: 930.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.48 : 1,316.28 = 675.40 : x
  2. Step 2: Convert to fraction form
    955.48/1,316.28 = 675.40/x
  3. Step 3: Cross multiply
    955.48x = 1,316.28 × 675.40
  4. Step 4: Simplify right side
    955.48x = 889,015.51
  5. Step 5: Solve for x
    x = 889,015.51/955.48
  6. Step 6: Final answer
    x = 930.44

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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.