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Finding the Fourth Proportional to 319,635.40, 479,280.30 and 132,665.80

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Solution

The fourth proportional to 319,635.40, 479,280.30 and 132,665.80 is: 198,926.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,635.40 : 479,280.30 = 132,665.80 : x
  2. Step 2: Convert to fraction form
    319,635.40/479,280.30 = 132,665.80/x
  3. Step 3: Cross multiply
    319,635.40x = 479,280.30 × 132,665.80
  4. Step 4: Simplify right side
    319,635.40x = 63,584,104,423.74
  5. Step 5: Solve for x
    x = 63,584,104,423.74/319,635.40
  6. Step 6: Final answer
    x = 198,926.98

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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.