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Finding the Fourth Proportional to 330,682.71, 493,778.18 and 321,714.66

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Solution

The fourth proportional to 330,682.71, 493,778.18 and 321,714.66 is: 480,387.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,682.71 : 493,778.18 = 321,714.66 : x
  2. Step 2: Convert to fraction form
    330,682.71/493,778.18 = 321,714.66/x
  3. Step 3: Cross multiply
    330,682.71x = 493,778.18 × 321,714.66
  4. Step 4: Simplify right side
    330,682.71x = 158,855,677,685.55
  5. Step 5: Solve for x
    x = 158,855,677,685.55/330,682.71
  6. Step 6: Final answer
    x = 480,387.01

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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.