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Finding the Fourth Proportional to 347,809.40, 521,714.10 and 326,814.20

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Solution

The fourth proportional to 347,809.40, 521,714.10 and 326,814.20 is: 490,221.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,809.40 : 521,714.10 = 326,814.20 : x
  2. Step 2: Convert to fraction form
    347,809.40/521,714.10 = 326,814.20/x
  3. Step 3: Cross multiply
    347,809.40x = 521,714.10 × 326,814.20
  4. Step 4: Simplify right side
    347,809.40x = 170,503,576,220.22
  5. Step 5: Solve for x
    x = 170,503,576,220.22/347,809.40
  6. Step 6: Final answer
    x = 490,221.30

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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.