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Finding the Fourth Proportional to 348,117.20, 521,398.20 and 285,909.20

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Solution

The fourth proportional to 348,117.20, 521,398.20 and 285,909.20 is: 428,225.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    348,117.20 : 521,398.20 = 285,909.20 : x
  2. Step 2: Convert to fraction form
    348,117.20/521,398.20 = 285,909.20/x
  3. Step 3: Cross multiply
    348,117.20x = 521,398.20 × 285,909.20
  4. Step 4: Simplify right side
    348,117.20x = 149,072,542,243.44
  5. Step 5: Solve for x
    x = 149,072,542,243.44/348,117.20
  6. Step 6: Final answer
    x = 428,225.16

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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.