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Finding the Fourth Proportional to 631,487.76, 871,465.64 and 345,025.56

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Solution

The fourth proportional to 631,487.76, 871,465.64 and 345,025.56 is: 476,142.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,487.76 : 871,465.64 = 345,025.56 : x
  2. Step 2: Convert to fraction form
    631,487.76/871,465.64 = 345,025.56/x
  3. Step 3: Cross multiply
    631,487.76x = 871,465.64 × 345,025.56
  4. Step 4: Simplify right side
    631,487.76x = 300,677,920,461.76
  5. Step 5: Solve for x
    x = 300,677,920,461.76/631,487.76
  6. Step 6: Final answer
    x = 476,142.12

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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.