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Finding the Fourth Proportional to 868,415.80, 1,302,234.90 and 394,857.40

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Solution

The fourth proportional to 868,415.80, 1,302,234.90 and 394,857.40 is: 592,109.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    868,415.80 : 1,302,234.90 = 394,857.40 : x
  2. Step 2: Convert to fraction form
    868,415.80/1,302,234.90 = 394,857.40/x
  3. Step 3: Cross multiply
    868,415.80x = 1,302,234.90 × 394,857.40
  4. Step 4: Simplify right side
    868,415.80x = 514,197,086,803.26
  5. Step 5: Solve for x
    x = 514,197,086,803.26/868,415.80
  6. Step 6: Final answer
    x = 592,109.32

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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.