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Finding the Fourth Proportional to 381,678.80, 572,518.20 and 361,995.80

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Solution

The fourth proportional to 381,678.80, 572,518.20 and 361,995.80 is: 542,993.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,678.80 : 572,518.20 = 361,995.80 : x
  2. Step 2: Convert to fraction form
    381,678.80/572,518.20 = 361,995.80/x
  3. Step 3: Cross multiply
    381,678.80x = 572,518.20 × 361,995.80
  4. Step 4: Simplify right side
    381,678.80x = 207,249,183,823.56
  5. Step 5: Solve for x
    x = 207,249,183,823.56/381,678.80
  6. Step 6: Final answer
    x = 542,993.70

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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.