Home / 815,478.47-1,125,374.21-447,971.11

Finding the Fourth Proportional to 815,478.47, 1,125,374.21 and 447,971.11

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Solution

The fourth proportional to 815,478.47, 1,125,374.21 and 447,971.11 is: 618,207.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,478.47 : 1,125,374.21 = 447,971.11 : x
  2. Step 2: Convert to fraction form
    815,478.47/1,125,374.21 = 447,971.11/x
  3. Step 3: Cross multiply
    815,478.47x = 1,125,374.21 × 447,971.11
  4. Step 4: Simplify right side
    815,478.47x = 504,135,126,152.35
  5. Step 5: Solve for x
    x = 504,135,126,152.35/815,478.47
  6. Step 6: Final answer
    x = 618,207.77

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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.