Home / 631,971.65-872,131.25-377,345.09

Finding the Fourth Proportional to 631,971.65, 872,131.25 and 377,345.09

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Solution

The fourth proportional to 631,971.65, 872,131.25 and 377,345.09 is: 520,742.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,971.65 : 872,131.25 = 377,345.09 : x
  2. Step 2: Convert to fraction form
    631,971.65/872,131.25 = 377,345.09/x
  3. Step 3: Cross multiply
    631,971.65x = 872,131.25 × 377,345.09
  4. Step 4: Simplify right side
    631,971.65x = 329,094,445,023.06
  5. Step 5: Solve for x
    x = 329,094,445,023.06/631,971.65
  6. Step 6: Final answer
    x = 520,742.42

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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.