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Finding the Fourth Proportional to 1,200.98, 1,654.79 and 807.32

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Solution

The fourth proportional to 1,200.98, 1,654.79 and 807.32 is: 1,112.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,200.98 : 1,654.79 = 807.32 : x
  2. Step 2: Convert to fraction form
    1,200.98/1,654.79 = 807.32/x
  3. Step 3: Cross multiply
    1,200.98x = 1,654.79 × 807.32
  4. Step 4: Simplify right side
    1,200.98x = 1,335,945.16
  5. Step 5: Solve for x
    x = 1,335,945.16/1,200.98
  6. Step 6: Final answer
    x = 1,112.38

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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.