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Finding the Fourth Proportional to 455,285.80, 682,928.70 and 139,701.70

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Solution

The fourth proportional to 455,285.80, 682,928.70 and 139,701.70 is: 209,552.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,285.80 : 682,928.70 = 139,701.70 : x
  2. Step 2: Convert to fraction form
    455,285.80/682,928.70 = 139,701.70/x
  3. Step 3: Cross multiply
    455,285.80x = 682,928.70 × 139,701.70
  4. Step 4: Simplify right side
    455,285.80x = 95,406,300,368.79
  5. Step 5: Solve for x
    x = 95,406,300,368.79/455,285.80
  6. Step 6: Final answer
    x = 209,552.55

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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.