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Finding the Fourth Proportional to 359,578.80, 539,951.40 and 260,434.80

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Solution

The fourth proportional to 359,578.80, 539,951.40 and 260,434.80 is: 391,074.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    359,578.80 : 539,951.40 = 260,434.80 : x
  2. Step 2: Convert to fraction form
    359,578.80/539,951.40 = 260,434.80/x
  3. Step 3: Cross multiply
    359,578.80x = 539,951.40 × 260,434.80
  4. Step 4: Simplify right side
    359,578.80x = 140,622,134,868.72
  5. Step 5: Solve for x
    x = 140,622,134,868.72/359,578.80
  6. Step 6: Final answer
    x = 391,074.60

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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.