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Finding the Fourth Proportional to 603,990.60, 903,653.10 and 394,038.60

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Solution

The fourth proportional to 603,990.60, 903,653.10 and 394,038.60 is: 589,536.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,990.60 : 903,653.10 = 394,038.60 : x
  2. Step 2: Convert to fraction form
    603,990.60/903,653.10 = 394,038.60/x
  3. Step 3: Cross multiply
    603,990.60x = 903,653.10 × 394,038.60
  4. Step 4: Simplify right side
    603,990.60x = 356,074,202,409.66
  5. Step 5: Solve for x
    x = 356,074,202,409.66/603,990.60
  6. Step 6: Final answer
    x = 589,536.00

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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.