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Finding the Fourth Proportional to 290,348.40, 434,946.60 and 255,711.60

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Solution

The fourth proportional to 290,348.40, 434,946.60 and 255,711.60 is: 383,060.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,348.40 : 434,946.60 = 255,711.60 : x
  2. Step 2: Convert to fraction form
    290,348.40/434,946.60 = 255,711.60/x
  3. Step 3: Cross multiply
    290,348.40x = 434,946.60 × 255,711.60
  4. Step 4: Simplify right side
    290,348.40x = 111,220,891,000.56
  5. Step 5: Solve for x
    x = 111,220,891,000.56/290,348.40
  6. Step 6: Final answer
    x = 383,060.11

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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.