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Finding the Fourth Proportional to 665.44, 924.68 and 657.28

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Solution

The fourth proportional to 665.44, 924.68 and 657.28 is: 913.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.44 : 924.68 = 657.28 : x
  2. Step 2: Convert to fraction form
    665.44/924.68 = 657.28/x
  3. Step 3: Cross multiply
    665.44x = 924.68 × 657.28
  4. Step 4: Simplify right side
    665.44x = 607,773.67
  5. Step 5: Solve for x
    x = 607,773.67/665.44
  6. Step 6: Final answer
    x = 913.34

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.