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Finding the Fourth Proportional to 338,881.80, 508,905.90 and 328,384.20

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Solution

The fourth proportional to 338,881.80, 508,905.90 and 328,384.20 is: 493,141.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,881.80 : 508,905.90 = 328,384.20 : x
  2. Step 2: Convert to fraction form
    338,881.80/508,905.90 = 328,384.20/x
  3. Step 3: Cross multiply
    338,881.80x = 508,905.90 × 328,384.20
  4. Step 4: Simplify right side
    338,881.80x = 167,116,656,846.78
  5. Step 5: Solve for x
    x = 167,116,656,846.78/338,881.80
  6. Step 6: Final answer
    x = 493,141.43

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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.