Home / 871,753.68-1,203,015.48-489,777.12

Finding the Fourth Proportional to 871,753.68, 1,203,015.48 and 489,777.12

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Solution

The fourth proportional to 871,753.68, 1,203,015.48 and 489,777.12 is: 675,889.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,753.68 : 1,203,015.48 = 489,777.12 : x
  2. Step 2: Convert to fraction form
    871,753.68/1,203,015.48 = 489,777.12/x
  3. Step 3: Cross multiply
    871,753.68x = 1,203,015.48 × 489,777.12
  4. Step 4: Simplify right side
    871,753.68x = 589,209,457,109.82
  5. Step 5: Solve for x
    x = 589,209,457,109.82/871,753.68
  6. Step 6: Final answer
    x = 675,889.84

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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.