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Finding the Fourth Proportional to 1,181.29, 1,630.16 and 657.31

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Solution

The fourth proportional to 1,181.29, 1,630.16 and 657.31 is: 907.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,181.29 : 1,630.16 = 657.31 : x
  2. Step 2: Convert to fraction form
    1,181.29/1,630.16 = 657.31/x
  3. Step 3: Cross multiply
    1,181.29x = 1,630.16 × 657.31
  4. Step 4: Simplify right side
    1,181.29x = 1,071,520.47
  5. Step 5: Solve for x
    x = 1,071,520.47/1,181.29
  6. Step 6: Final answer
    x = 907.08

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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.