Home / 391,044.08-539,684.72-221,289.16

Finding the Fourth Proportional to 391,044.08, 539,684.72 and 221,289.16

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Solution

The fourth proportional to 391,044.08, 539,684.72 and 221,289.16 is: 305,403.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,044.08 : 539,684.72 = 221,289.16 : x
  2. Step 2: Convert to fraction form
    391,044.08/539,684.72 = 221,289.16/x
  3. Step 3: Cross multiply
    391,044.08x = 539,684.72 × 221,289.16
  4. Step 4: Simplify right side
    391,044.08x = 119,426,378,353.64
  5. Step 5: Solve for x
    x = 119,426,378,353.64/391,044.08
  6. Step 6: Final answer
    x = 305,403.88

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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.