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Finding the Fourth Proportional to 339,037.80, 508,721.88 and 139,418.16

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Solution

The fourth proportional to 339,037.80, 508,721.88 and 139,418.16 is: 209,195.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,037.80 : 508,721.88 = 139,418.16 : x
  2. Step 2: Convert to fraction form
    339,037.80/508,721.88 = 139,418.16/x
  3. Step 3: Cross multiply
    339,037.80x = 508,721.88 × 139,418.16
  4. Step 4: Simplify right side
    339,037.80x = 70,925,068,461.34
  5. Step 5: Solve for x
    x = 70,925,068,461.34/339,037.80
  6. Step 6: Final answer
    x = 209,195.16

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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.