Home / 780,989.61-1,170,147.09-426,252.54

Finding the Fourth Proportional to 780,989.61, 1,170,147.09 and 426,252.54

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Solution

The fourth proportional to 780,989.61, 1,170,147.09 and 426,252.54 is: 638,648.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,989.61 : 1,170,147.09 = 426,252.54 : x
  2. Step 2: Convert to fraction form
    780,989.61/1,170,147.09 = 426,252.54/x
  3. Step 3: Cross multiply
    780,989.61x = 1,170,147.09 × 426,252.54
  4. Step 4: Simplify right side
    780,989.61x = 498,778,169,286.11
  5. Step 5: Solve for x
    x = 498,778,169,286.11/780,989.61
  6. Step 6: Final answer
    x = 638,648.92

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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.