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Finding the Fourth Proportional to 631,602.16, 871,617.11 and 345,128.38

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Solution

The fourth proportional to 631,602.16, 871,617.11 and 345,128.38 is: 476,280.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,602.16 : 871,617.11 = 345,128.38 : x
  2. Step 2: Convert to fraction form
    631,602.16/871,617.11 = 345,128.38/x
  3. Step 3: Cross multiply
    631,602.16x = 871,617.11 × 345,128.38
  4. Step 4: Simplify right side
    631,602.16x = 300,819,797,249.90
  5. Step 5: Solve for x
    x = 300,819,797,249.90/631,602.16
  6. Step 6: Final answer
    x = 476,280.51

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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.