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Finding the Fourth Proportional to 399,994.80, 600,683.40 and 213,370.80

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Solution

The fourth proportional to 399,994.80, 600,683.40 and 213,370.80 is: 320,424.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,994.80 : 600,683.40 = 213,370.80 : x
  2. Step 2: Convert to fraction form
    399,994.80/600,683.40 = 213,370.80/x
  3. Step 3: Cross multiply
    399,994.80x = 600,683.40 × 213,370.80
  4. Step 4: Simplify right side
    399,994.80x = 128,168,297,604.72
  5. Step 5: Solve for x
    x = 128,168,297,604.72/399,994.80
  6. Step 6: Final answer
    x = 320,424.91

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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.