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Finding the Fourth Proportional to 542,404.20, 812,828.70 and 399,131.40

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Solution

The fourth proportional to 542,404.20, 812,828.70 and 399,131.40 is: 598,124.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,404.20 : 812,828.70 = 399,131.40 : x
  2. Step 2: Convert to fraction form
    542,404.20/812,828.70 = 399,131.40/x
  3. Step 3: Cross multiply
    542,404.20x = 812,828.70 × 399,131.40
  4. Step 4: Simplify right side
    542,404.20x = 324,425,456,991.18
  5. Step 5: Solve for x
    x = 324,425,456,991.18/542,404.20
  6. Step 6: Final answer
    x = 598,124.90

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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.