Home / 681,549.47-940,849.06-485,442.21

Finding the Fourth Proportional to 681,549.47, 940,849.06 and 485,442.21

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Solution

The fourth proportional to 681,549.47, 940,849.06 and 485,442.21 is: 670,131.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,549.47 : 940,849.06 = 485,442.21 : x
  2. Step 2: Convert to fraction form
    681,549.47/940,849.06 = 485,442.21/x
  3. Step 3: Cross multiply
    681,549.47x = 940,849.06 × 485,442.21
  4. Step 4: Simplify right side
    681,549.47x = 456,727,841,566.54
  5. Step 5: Solve for x
    x = 456,727,841,566.54/681,549.47
  6. Step 6: Final answer
    x = 670,131.61

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Half scale
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Double scale
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Similar ratio
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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.