Home / 871,786.30-1,203,066.15-489,812.86

Finding the Fourth Proportional to 871,786.30, 1,203,066.15 and 489,812.86

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Solution

The fourth proportional to 871,786.30, 1,203,066.15 and 489,812.86 is: 675,942.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,786.30 : 1,203,066.15 = 489,812.86 : x
  2. Step 2: Convert to fraction form
    871,786.30/1,203,066.15 = 489,812.86/x
  3. Step 3: Cross multiply
    871,786.30x = 1,203,066.15 × 489,812.86
  4. Step 4: Simplify right side
    871,786.30x = 589,277,271,700.69
  5. Step 5: Solve for x
    x = 589,277,271,700.69/871,786.30
  6. Step 6: Final answer
    x = 675,942.34

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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.