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Finding the Fourth Proportional to 631,768.28, 871,838.10 and 345,288.28

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Solution

The fourth proportional to 631,768.28, 871,838.10 and 345,288.28 is: 476,496.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,768.28 : 871,838.10 = 345,288.28 : x
  2. Step 2: Convert to fraction form
    631,768.28/871,838.10 = 345,288.28/x
  3. Step 3: Cross multiply
    631,768.28x = 871,838.10 × 345,288.28
  4. Step 4: Simplify right side
    631,768.28x = 301,035,477,987.47
  5. Step 5: Solve for x
    x = 301,035,477,987.47/631,768.28
  6. Step 6: Final answer
    x = 476,496.66

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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.