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Finding the Fourth Proportional to 476,620.71, 715,029.46 and 139,672.35

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Solution

The fourth proportional to 476,620.71, 715,029.46 and 139,672.35 is: 209,537.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    476,620.71 : 715,029.46 = 139,672.35 : x
  2. Step 2: Convert to fraction form
    476,620.71/715,029.46 = 139,672.35/x
  3. Step 3: Cross multiply
    476,620.71x = 715,029.46 × 139,672.35
  4. Step 4: Simplify right side
    476,620.71x = 99,869,844,648.25
  5. Step 5: Solve for x
    x = 99,869,844,648.25/476,620.71
  6. Step 6: Final answer
    x = 209,537.36

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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.