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Finding the Fourth Proportional to 359,986.20, 539,979.30 and 265,507.80

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Solution

The fourth proportional to 359,986.20, 539,979.30 and 265,507.80 is: 398,261.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    359,986.20 : 539,979.30 = 265,507.80 : x
  2. Step 2: Convert to fraction form
    359,986.20/539,979.30 = 265,507.80/x
  3. Step 3: Cross multiply
    359,986.20x = 539,979.30 × 265,507.80
  4. Step 4: Simplify right side
    359,986.20x = 143,368,715,988.54
  5. Step 5: Solve for x
    x = 143,368,715,988.54/359,986.20
  6. Step 6: Final answer
    x = 398,261.70

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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.