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Finding the Fourth Proportional to 681,656.81, 940,340.69 and 520,231.60

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Solution

The fourth proportional to 681,656.81, 940,340.69 and 520,231.60 is: 717,655.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,656.81 : 940,340.69 = 520,231.60 : x
  2. Step 2: Convert to fraction form
    681,656.81/940,340.69 = 520,231.60/x
  3. Step 3: Cross multiply
    681,656.81x = 940,340.69 × 520,231.60
  4. Step 4: Simplify right side
    681,656.81x = 489,194,941,703.80
  5. Step 5: Solve for x
    x = 489,194,941,703.80/681,656.81
  6. Step 6: Final answer
    x = 717,655.77

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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.