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Finding the Fourth Proportional to 347,722.40, 521,583.60 and 331,392.80

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Solution

The fourth proportional to 347,722.40, 521,583.60 and 331,392.80 is: 497,089.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,722.40 : 521,583.60 = 331,392.80 : x
  2. Step 2: Convert to fraction form
    347,722.40/521,583.60 = 331,392.80/x
  3. Step 3: Cross multiply
    347,722.40x = 521,583.60 × 331,392.80
  4. Step 4: Simplify right side
    347,722.40x = 172,849,049,638.08
  5. Step 5: Solve for x
    x = 172,849,049,638.08/347,722.40
  6. Step 6: Final answer
    x = 497,089.20

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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.