Home / 665,220.48-917,732.25-491,207.64

Finding the Fourth Proportional to 665,220.48, 917,732.25 and 491,207.64

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Solution

The fourth proportional to 665,220.48, 917,732.25 and 491,207.64 is: 677,665.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,220.48 : 917,732.25 = 491,207.64 : x
  2. Step 2: Convert to fraction form
    665,220.48/917,732.25 = 491,207.64/x
  3. Step 3: Cross multiply
    665,220.48x = 917,732.25 × 491,207.64
  4. Step 4: Simplify right side
    665,220.48x = 450,797,092,674.39
  5. Step 5: Solve for x
    x = 450,797,092,674.39/665,220.48
  6. Step 6: Final answer
    x = 677,665.69

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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.