Home / 390,629.07-585,999.75-120,778.25

Finding the Fourth Proportional to 390,629.07, 585,999.75 and 120,778.25

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Solution

The fourth proportional to 390,629.07, 585,999.75 and 120,778.25 is: 181,184.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,629.07 : 585,999.75 = 120,778.25 : x
  2. Step 2: Convert to fraction form
    390,629.07/585,999.75 = 120,778.25/x
  3. Step 3: Cross multiply
    390,629.07x = 585,999.75 × 120,778.25
  4. Step 4: Simplify right side
    390,629.07x = 70,776,025,778.82
  5. Step 5: Solve for x
    x = 70,776,025,778.82/390,629.07
  6. Step 6: Final answer
    x = 181,184.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.