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Finding the Fourth Proportional to 348,048.20, 521,294.70 and 285,840.20

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Solution

The fourth proportional to 348,048.20, 521,294.70 and 285,840.20 is: 428,121.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    348,048.20 : 521,294.70 = 285,840.20 : x
  2. Step 2: Convert to fraction form
    348,048.20/521,294.70 = 285,840.20/x
  3. Step 3: Cross multiply
    348,048.20x = 521,294.70 × 285,840.20
  4. Step 4: Simplify right side
    348,048.20x = 149,006,981,306.94
  5. Step 5: Solve for x
    x = 149,006,981,306.94/348,048.20
  6. Step 6: Final answer
    x = 428,121.68

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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.