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Finding the Fourth Proportional to 631,625.53, 871,732.14 and 402,109.45

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Solution

The fourth proportional to 631,625.53, 871,732.14 and 402,109.45 is: 554,967.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,625.53 : 871,732.14 = 402,109.45 : x
  2. Step 2: Convert to fraction form
    631,625.53/871,732.14 = 402,109.45/x
  3. Step 3: Cross multiply
    631,625.53x = 871,732.14 × 402,109.45
  4. Step 4: Simplify right side
    631,625.53x = 350,531,731,362.72
  5. Step 5: Solve for x
    x = 350,531,731,362.72/631,625.53
  6. Step 6: Final answer
    x = 554,967.64

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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.