Home / 400,780.31-553,076.51-219,503.52

Finding the Fourth Proportional to 400,780.31, 553,076.51 and 219,503.52

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Solution

The fourth proportional to 400,780.31, 553,076.51 and 219,503.52 is: 302,914.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,780.31 : 553,076.51 = 219,503.52 : x
  2. Step 2: Convert to fraction form
    400,780.31/553,076.51 = 219,503.52/x
  3. Step 3: Cross multiply
    400,780.31x = 553,076.51 × 219,503.52
  4. Step 4: Simplify right side
    400,780.31x = 121,402,239,676.80
  5. Step 5: Solve for x
    x = 121,402,239,676.80/400,780.31
  6. Step 6: Final answer
    x = 302,914.68

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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.