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Finding the Fourth Proportional to 290,617.80, 435,926.70 and 255,625.80

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Solution

The fourth proportional to 290,617.80, 435,926.70 and 255,625.80 is: 383,438.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,617.80 : 435,926.70 = 255,625.80 : x
  2. Step 2: Convert to fraction form
    290,617.80/435,926.70 = 255,625.80/x
  3. Step 3: Cross multiply
    290,617.80x = 435,926.70 × 255,625.80
  4. Step 4: Simplify right side
    290,617.80x = 111,434,111,428.86
  5. Step 5: Solve for x
    x = 111,434,111,428.86/290,617.80
  6. Step 6: Final answer
    x = 383,438.70

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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.