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Finding the Fourth Proportional to 665,215.38, 917,725.38 and 491,202.54

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Solution

The fourth proportional to 665,215.38, 917,725.38 and 491,202.54 is: 677,658.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,215.38 : 917,725.38 = 491,202.54 : x
  2. Step 2: Convert to fraction form
    665,215.38/917,725.38 = 491,202.54/x
  3. Step 3: Cross multiply
    665,215.38x = 917,725.38 × 491,202.54
  4. Step 4: Simplify right side
    665,215.38x = 450,789,037,678.47
  5. Step 5: Solve for x
    x = 450,789,037,678.47/665,215.38
  6. Step 6: Final answer
    x = 677,658.77

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Double scale
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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.