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Finding the Fourth Proportional to 808.54, 1,111.88 and 675.70

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Solution

The fourth proportional to 808.54, 1,111.88 and 675.70 is: 929.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    808.54 : 1,111.88 = 675.70 : x
  2. Step 2: Convert to fraction form
    808.54/1,111.88 = 675.70/x
  3. Step 3: Cross multiply
    808.54x = 1,111.88 × 675.70
  4. Step 4: Simplify right side
    808.54x = 751,296.23
  5. Step 5: Solve for x
    x = 751,296.23/808.54
  6. Step 6: Final answer
    x = 929.20

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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.