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Finding the Fourth Proportional to 359,396.80, 539,095.20 and 320,689.60

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Solution

The fourth proportional to 359,396.80, 539,095.20 and 320,689.60 is: 481,034.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    359,396.80 : 539,095.20 = 320,689.60 : x
  2. Step 2: Convert to fraction form
    359,396.80/539,095.20 = 320,689.60/x
  3. Step 3: Cross multiply
    359,396.80x = 539,095.20 × 320,689.60
  4. Step 4: Simplify right side
    359,396.80x = 172,882,224,049.92
  5. Step 5: Solve for x
    x = 172,882,224,049.92/359,396.80
  6. Step 6: Final answer
    x = 481,034.40

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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.