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Finding the Fourth Proportional to 665.04, 995.86 and 645.58

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Solution

The fourth proportional to 665.04, 995.86 and 645.58 is: 966.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.04 : 995.86 = 645.58 : x
  2. Step 2: Convert to fraction form
    665.04/995.86 = 645.58/x
  3. Step 3: Cross multiply
    665.04x = 995.86 × 645.58
  4. Step 4: Simplify right side
    665.04x = 642,907.30
  5. Step 5: Solve for x
    x = 642,907.30/665.04
  6. Step 6: Final answer
    x = 966.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.