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Finding the Fourth Proportional to 631,681.29, 871,699.91 and 345,200.49

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Solution

The fourth proportional to 631,681.29, 871,699.91 and 345,200.49 is: 476,365.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,681.29 : 871,699.91 = 345,200.49 : x
  2. Step 2: Convert to fraction form
    631,681.29/871,699.91 = 345,200.49/x
  3. Step 3: Cross multiply
    631,681.29x = 871,699.91 × 345,200.49
  4. Step 4: Simplify right side
    631,681.29x = 300,911,234,338.95
  5. Step 5: Solve for x
    x = 300,911,234,338.95/631,681.29
  6. Step 6: Final answer
    x = 476,365.60

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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.