Home / 319,783.20-479,545.20-109,312.80

Finding the Fourth Proportional to 319,783.20, 479,545.20 and 109,312.80

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Solution

The fourth proportional to 319,783.20, 479,545.20 and 109,312.80 is: 163,924.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,783.20 : 479,545.20 = 109,312.80 : x
  2. Step 2: Convert to fraction form
    319,783.20/479,545.20 = 109,312.80/x
  3. Step 3: Cross multiply
    319,783.20x = 479,545.20 × 109,312.80
  4. Step 4: Simplify right side
    319,783.20x = 52,420,428,538.56
  5. Step 5: Solve for x
    x = 52,420,428,538.56/319,783.20
  6. Step 6: Final answer
    x = 163,924.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.