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Finding the Fourth Proportional to 631,804.32, 871,885.44 and 345,319.20

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Solution

The fourth proportional to 631,804.32, 871,885.44 and 345,319.20 is: 476,538.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,804.32 : 871,885.44 = 345,319.20 : x
  2. Step 2: Convert to fraction form
    631,804.32/871,885.44 = 345,319.20/x
  3. Step 3: Cross multiply
    631,804.32x = 871,885.44 × 345,319.20
  4. Step 4: Simplify right side
    631,804.32x = 301,078,782,632.45
  5. Step 5: Solve for x
    x = 301,078,782,632.45/631,804.32
  6. Step 6: Final answer
    x = 476,538.02

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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.