Home / 487,190.68-671,989.54-317,654.44

Finding the Fourth Proportional to 487,190.68, 671,989.54 and 317,654.44

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Solution

The fourth proportional to 487,190.68, 671,989.54 and 317,654.44 is: 438,145.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,190.68 : 671,989.54 = 317,654.44 : x
  2. Step 2: Convert to fraction form
    487,190.68/671,989.54 = 317,654.44/x
  3. Step 3: Cross multiply
    487,190.68x = 671,989.54 × 317,654.44
  4. Step 4: Simplify right side
    487,190.68x = 213,460,458,540.45
  5. Step 5: Solve for x
    x = 213,460,458,540.45/487,190.68
  6. Step 6: Final answer
    x = 438,145.61

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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.