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Finding the Fourth Proportional to 399,309.40, 598,818.30 and 133,078.60

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Solution

The fourth proportional to 399,309.40, 598,818.30 and 133,078.60 is: 199,569.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,309.40 : 598,818.30 = 133,078.60 : x
  2. Step 2: Convert to fraction form
    399,309.40/598,818.30 = 133,078.60/x
  3. Step 3: Cross multiply
    399,309.40x = 598,818.30 × 133,078.60
  4. Step 4: Simplify right side
    399,309.40x = 79,689,901,018.38
  5. Step 5: Solve for x
    x = 79,689,901,018.38/399,309.40
  6. Step 6: Final answer
    x = 199,569.31

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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.