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Finding the Fourth Proportional to 681,851.72, 940,609.38 and 520,426.60

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Solution

The fourth proportional to 681,851.72, 940,609.38 and 520,426.60 is: 717,924.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,851.72 : 940,609.38 = 520,426.60 : x
  2. Step 2: Convert to fraction form
    681,851.72/940,609.38 = 520,426.60/x
  3. Step 3: Cross multiply
    681,851.72x = 940,609.38 × 520,426.60
  4. Step 4: Simplify right side
    681,851.72x = 489,518,141,561.51
  5. Step 5: Solve for x
    x = 489,518,141,561.51/681,851.72
  6. Step 6: Final answer
    x = 717,924.63

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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.