Home / 490,991.28-677,339.19-318,897.06

Finding the Fourth Proportional to 490,991.28, 677,339.19 and 318,897.06

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Solution

The fourth proportional to 490,991.28, 677,339.19 and 318,897.06 is: 439,929.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,991.28 : 677,339.19 = 318,897.06 : x
  2. Step 2: Convert to fraction form
    490,991.28/677,339.19 = 318,897.06/x
  3. Step 3: Cross multiply
    490,991.28x = 677,339.19 × 318,897.06
  4. Step 4: Simplify right side
    490,991.28x = 216,001,476,313.78
  5. Step 5: Solve for x
    x = 216,001,476,313.78/490,991.28
  6. Step 6: Final answer
    x = 439,929.35

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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.