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Finding the Fourth Proportional to 442,703.70, 660,602.73 and 394,990.80

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Solution

The fourth proportional to 442,703.70, 660,602.73 and 394,990.80 is: 589,405.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,703.70 : 660,602.73 = 394,990.80 : x
  2. Step 2: Convert to fraction form
    442,703.70/660,602.73 = 394,990.80/x
  3. Step 3: Cross multiply
    442,703.70x = 660,602.73 × 394,990.80
  4. Step 4: Simplify right side
    442,703.70x = 260,932,000,804.88
  5. Step 5: Solve for x
    x = 260,932,000,804.88/442,703.70
  6. Step 6: Final answer
    x = 589,405.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.