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Finding the Fourth Proportional to 604,507.80, 905,724.90 and 394,037.40

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Solution

The fourth proportional to 604,507.80, 905,724.90 and 394,037.40 is: 590,380.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    604,507.80 : 905,724.90 = 394,037.40 : x
  2. Step 2: Convert to fraction form
    604,507.80/905,724.90 = 394,037.40/x
  3. Step 3: Cross multiply
    604,507.80x = 905,724.90 × 394,037.40
  4. Step 4: Simplify right side
    604,507.80x = 356,889,484,711.26
  5. Step 5: Solve for x
    x = 356,889,484,711.26/604,507.80
  6. Step 6: Final answer
    x = 590,380.28

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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.