Home / 543,821.20-815,731.80-319,289.20

Finding the Fourth Proportional to 543,821.20, 815,731.80 and 319,289.20

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Solution

The fourth proportional to 543,821.20, 815,731.80 and 319,289.20 is: 478,933.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,821.20 : 815,731.80 = 319,289.20 : x
  2. Step 2: Convert to fraction form
    543,821.20/815,731.80 = 319,289.20/x
  3. Step 3: Cross multiply
    543,821.20x = 815,731.80 × 319,289.20
  4. Step 4: Simplify right side
    543,821.20x = 260,454,353,836.56
  5. Step 5: Solve for x
    x = 260,454,353,836.56/543,821.20
  6. Step 6: Final answer
    x = 478,933.80

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1.5x scale

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.