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Finding the Fourth Proportional to 348,377.20, 521,788.20 and 286,169.20

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Solution

The fourth proportional to 348,377.20, 521,788.20 and 286,169.20 is: 428,615.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    348,377.20 : 521,788.20 = 286,169.20 : x
  2. Step 2: Convert to fraction form
    348,377.20/521,788.20 = 286,169.20/x
  3. Step 3: Cross multiply
    348,377.20x = 521,788.20 × 286,169.20
  4. Step 4: Simplify right side
    348,377.20x = 149,319,711,763.44
  5. Step 5: Solve for x
    x = 149,319,711,763.44/348,377.20
  6. Step 6: Final answer
    x = 428,615.05

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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.