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Finding the Fourth Proportional to 455,248.80, 682,975.20 and 139,737.60

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Solution

The fourth proportional to 455,248.80, 682,975.20 and 139,737.60 is: 209,637.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,248.80 : 682,975.20 = 139,737.60 : x
  2. Step 2: Convert to fraction form
    455,248.80/682,975.20 = 139,737.60/x
  3. Step 3: Cross multiply
    455,248.80x = 682,975.20 × 139,737.60
  4. Step 4: Simplify right side
    455,248.80x = 95,437,315,307.52
  5. Step 5: Solve for x
    x = 95,437,315,307.52/455,248.80
  6. Step 6: Final answer
    x = 209,637.71

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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.