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Finding the Fourth Proportional to 455,014.40, 682,621.22 and 139,495.91

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Solution

The fourth proportional to 455,014.40, 682,621.22 and 139,495.91 is: 209,274.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,014.40 : 682,621.22 = 139,495.91 : x
  2. Step 2: Convert to fraction form
    455,014.40/682,621.22 = 139,495.91/x
  3. Step 3: Cross multiply
    455,014.40x = 682,621.22 × 139,495.91
  4. Step 4: Simplify right side
    455,014.40x = 95,222,865,204.84
  5. Step 5: Solve for x
    x = 95,222,865,204.84/455,014.40
  6. Step 6: Final answer
    x = 209,274.40

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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.