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Finding the Fourth Proportional to 880,661.80, 1,215,601.86 and 518,066.92

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Solution

The fourth proportional to 880,661.80, 1,215,601.86 and 518,066.92 is: 715,102.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    880,661.80 : 1,215,601.86 = 518,066.92 : x
  2. Step 2: Convert to fraction form
    880,661.80/1,215,601.86 = 518,066.92/x
  3. Step 3: Cross multiply
    880,661.80x = 1,215,601.86 × 518,066.92
  4. Step 4: Simplify right side
    880,661.80x = 629,763,111,556.47
  5. Step 5: Solve for x
    x = 629,763,111,556.47/880,661.80
  6. Step 6: Final answer
    x = 715,102.11

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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.