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Finding the Fourth Proportional to 631,543.64, 871,528.92 and 345,065.77

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Solution

The fourth proportional to 631,543.64, 871,528.92 and 345,065.77 is: 476,190.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,543.64 : 871,528.92 = 345,065.77 : x
  2. Step 2: Convert to fraction form
    631,543.64/871,528.92 = 345,065.77/x
  3. Step 3: Cross multiply
    631,543.64x = 871,528.92 × 345,065.77
  4. Step 4: Simplify right side
    631,543.64x = 300,734,797,652.48
  5. Step 5: Solve for x
    x = 300,734,797,652.48/631,543.64
  6. Step 6: Final answer
    x = 476,190.05

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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.