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Finding the Fourth Proportional to 290,302.80, 434,579.40 and 255,310.80

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Solution

The fourth proportional to 290,302.80, 434,579.40 and 255,310.80 is: 382,196.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,302.80 : 434,579.40 = 255,310.80 : x
  2. Step 2: Convert to fraction form
    290,302.80/434,579.40 = 255,310.80/x
  3. Step 3: Cross multiply
    290,302.80x = 434,579.40 × 255,310.80
  4. Step 4: Simplify right side
    290,302.80x = 110,952,814,277.52
  5. Step 5: Solve for x
    x = 110,952,814,277.52/290,302.80
  6. Step 6: Final answer
    x = 382,196.85

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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.