Home / 631,899.09-872,477.37-390,512.61

Finding the Fourth Proportional to 631,899.09, 872,477.37 and 390,512.61

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Solution

The fourth proportional to 631,899.09, 872,477.37 and 390,512.61 is: 539,189.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,899.09 : 872,477.37 = 390,512.61 : x
  2. Step 2: Convert to fraction form
    631,899.09/872,477.37 = 390,512.61/x
  3. Step 3: Cross multiply
    631,899.09x = 872,477.37 × 390,512.61
  4. Step 4: Simplify right side
    631,899.09x = 340,713,414,924.64
  5. Step 5: Solve for x
    x = 340,713,414,924.64/631,899.09
  6. Step 6: Final answer
    x = 539,189.60

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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.