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Finding the Fourth Proportional to 399,098.40, 598,730.80 and 132,941.60

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Solution

The fourth proportional to 399,098.40, 598,730.80 and 132,941.60 is: 199,440.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,098.40 : 598,730.80 = 132,941.60 : x
  2. Step 2: Convert to fraction form
    399,098.40/598,730.80 = 132,941.60/x
  3. Step 3: Cross multiply
    399,098.40x = 598,730.80 × 132,941.60
  4. Step 4: Simplify right side
    399,098.40x = 79,596,230,521.28
  5. Step 5: Solve for x
    x = 79,596,230,521.28/399,098.40
  6. Step 6: Final answer
    x = 199,440.11

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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.